It is possible .
But I wouldnt treat this as "fact " ,for a start the PS3 number is through leaked information ,we dont know is it is reliable at all .
Second Nintendo can be making its numbers seem more positive (for example making the calculations not after natural week but after 7 days in holidays etc ) .
In any case if the PS3 number is correct they have sold at least 172K+30K +17K ....so they have surpassed already the 220K machines sold .