proportionately vs proportionally

proportionately and proportionally both are adverbs.

Word	Noun	Adjective	Verb	Adverb
proportionately	No	No	No	Yes
proportionally	No	No	No	Yes

As adverbs, proportionately and proportionally are synonyms defined as:

proportionately (adverb)	proportionally (adverb)
to a proportionate degree	to a proportionate degree
in a way that is in correspondence among the constituents of another entity
in a way that agrees in amount, magnitude or degree