Rationaly or Rationally: How To spell?
The word Rationaly is misspelled against Rationally, an adverb meaning "In a rational manner."
Rationally has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings rationa & y which should not be misspelled with single 'L'
Wrong Spelling:  rationa-l-y  Correct Spelling:  rationa-ll-y 
Find more incorrect spellings of Rationally to spell right way.