A laboratory technician measures 48 ml of urine sample in a 4-ounce beaker. How many more ml of urine are necessary to fill the beaker?
1 ounce is equal to 29.5735 ml, therefore a 4-ounce beaker is equal to 4 * 29.5735 ml = <<4*29.5735=118.294>>118.294 ml.
It is necessary to add 118.294 ml - 48 ml = <<118.294-48=70.294>>70.294 ml. Answer: \boxed{70.294}.