'Proportionally' definitions:

Definition of 'proportionally'

From: WordNet
adverb
To a proportionate degree; "your salary will rise proportionately to your workload" [syn: proportionately, proportionally] [ant: disproportionately]

Definition of 'Proportionally'

From: GCIDE
  • Proportionally \Pro*por"tion*al*ly\, adv. In proportion; in due degree; adapted relatively; as, all parts of the building are proportionally large. --Sir I. Newton. [1913 Webster]