This is completely off base. Say the population is 8 to 1 white. If sexual assaults were uncorrelated with the race of victim or perpetrator, you would have w/w, w/b, b/w, b/b assaults in the ratio
64 : 8 : 8 : 1 ; note b/w = w/b since in the one case you have more perps but in the other case more targets.
With the reported ratios of 55 : 2 : 15 : 24 , you have perps in the ratio of 57 : 39 instead of 8 : 1, so a black man ( say ) is 5.4 times as likely to be a perp than a white man, but a black woman (assuming woman = target ) is 12 times as likely to be his victim than a white woman. Conversely, a white woman is 3.5 times as likely to be a victim of a white perp than a black woman, so black perps "favor" black victims to a much greater degree than white perps "favor" white victims.