The phrase "as high as a third" is correct and usable in written English.
It can be used in contexts where you are comparing a quantity or measurement to a third of something, often in discussions about proportions or statistics.
Example: "The temperature rose as high as a third of the average summer highs recorded last year."
Alternatives: "up to a third" or "reaching a third".
Some estimates put the contribution of the global food system to manmade greenhouse gas emissions as high as a third.
In some cities, like Moscow and St .Petersburg, he believed, it could be as high as a third.
In a country where illiteracy runs as high as a third of the population, the programs have become the most potent forum for shaping public opinion.
In Spain, unemployment was 22.8 percent at the end of 2011, and as high as a third among consumers under 30 years old, a key cellphone market.
From 1998 to 2000, turnover in some divisions was as high as a third each year, and the average pay was less than half of what was being offered for comparable jobs in the private sector.
George Galloway told the meeting: Bradford has led the way on this as with so many other things and it's time for the rest of the country to follow Prof Dave Webb, chairman of CND, who was not at the protest, says: Civilian casualties of drone strikes are estimated as high as a third to one half of all victims.
Molten metals cooled at rates as high as a million degrees per second tend to solidify into a relatively homogeneous microstructure, since there is insufficient time for crystalline grains to nucleate and grow.
Even with the best of intentions, the chances of him slipping up at some point are as about as high as a freshman taking his first hit off a gravity bong.
But for short-term pleasure, nothing beats that magical moment when you perceive that, having slogged through several difficult days doing nothing and saying even less, you're as high as a hippie in the seventh hour of a Grateful Dead gig.
But NBC also posted a rating as high as an 18.7, for Chicago's second straight six-game defeat of Utah in 1998.
He climbed into contention again, getting as high as third, but a bad pit stop and a scrape with Ryan Newman cost Johnson a chance to become the first driver since 2007 to make it three in a row.
