Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
disproportionate [dɪsprəˈpɔːʃənət] adj (excessive) неопра́вданно большо́й
our income is disproportionate to our expenditure на́ши дохо́ды не соизмери́мы с на́шими расхо́дами
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.