'proportionally higher' is correct and usable in written English.
You can use it when comparing two or more similar quantities that are proportional to each other in some way. For example, "The price of houses in this neighborhood is proportionally higher than in other areas."
At 5%, it was proportionally higher at the time than New York, Chicago, or Detroit – and growing faster as well.
This does not necessarily mean proportionally higher average energy bills, as households will naturally invest in energy efficiency improvements.
The results show that lower storeys have a proportionally higher stiffness effect than higher storeys.
When they nudged the laser to a lower frequency, the duration of the pulses lengthened proportionally; higher frequencies produced quicker pulses.
Using SOSD the states are ranked under the assumption that proportionally higher and more equally distributed adoption rates are better.
We found that practically all self-heating occurs through Joule heating, suggesting that higher current density produces proportionally higher heat dissipation.
Hydrogels with higher concentrations of hyaluronidase solution and HA/CS content had proportionally higher enzymatic degradation rates.
This could be caused by a proportionally higher toxicity mediated by other mechanisms not influenced by the external BAs after short-term exposure.
And he leaves out more recent data suggesting that blacks are killed in proportionally higher numbers, which is misleading, to say the least.
Results indicate that in some foraging seasons, particularly hypophagia, the grizzly bear population's use of disturbed areas was proportionally higher than use in undisturbed areas.
Those criminal justice areas receiving most complaints have proportionally higher rates of retention and conviction, suggesting that they give confidence to women to complain and that, when they do, their more experienced teams are more successful at securing convictions.
