'Proportionately' definitions:

Definition of 'proportionately'

From: WordNet
adverb
To a proportionate degree; "your salary will rise proportionately to your workload" [syn: proportionately, proportionally] [ant: disproportionately]
adverb
In proportion; "the height of this wall must be reduced proportionately to give the room pleasant dimensions" [ant: disproportionately]
adverb
In proportion [syn: proportionately, pro rata]

Definition of 'Proportionately'

From: GCIDE
  • Proportionately \Pro*por"tion*ate*ly\, adv. In a proportionate manner; with due proportion; proportionally. [1913 Webster]

Synonyms of 'proportionately'

From: Moby Thesaurus