Maximum weight that helium balloon can lift

[Raiden9]

Hi. I have been trying to do this question for about an hour now...

A 0.12 kg balloon is filled with helium (density-0.179). If the balloon is a sphere with a radius of 5.2m what is the maximum weight it can lift.

I tried using the P=M/V then Fb=pgV...No luck...Help..

 

[Raiden9]

Oh dear...The answer was I forgot to use the density...Silly me..