yield is coupon / par
That is the formula for current yield, which is not the yield that the WSJ reports.
The yield they report is most likely the Yield to Maturity, which is the equivalent interest rate that would give you the same net return for a bond if you reinvested the coupons as they were received. In other words, at what interest rate could you invest the 102 1/32 and get the same effective return as buying the bond?
That yield calculation requires iterating on the interest rate (except for very simple bond schedules), but knowing the yield you can figure out the coupon with just a little algebra.
The formula for price given a coupon and yield would be:
P = C/(1+r) + C/(1+r)^2 + C/(1+r)^3... + (100+C)/(1+r)^n
C are the periodic (e.g. semi-annual) yield and coupon, and n is the number of periods until maturity. So you can solve the above equation for C without iteration.