Math problem ... for sale is 124 4" squares of fabric - how many yards does that make it?

As in .... I want to make a blanket out of the squares if its enough, a rag quilt. I want the blanket to fit a double bed, I need approx 70" square blanket. (bit less width wise is ok). Will this work, how many yards does this come out to be? I need 5 yrds for each side of blanket 10 yrds all together