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At first , the total number of ducks in ponds X, Y and Z was 144.
`1/2` of the ducks in pond X are sold and 12 ducks in pond Y are removed.
Also, more ducks are purchased such that the number of ducks in pond Z tripled.
Then, the ratio of the number of ducks in ponds X, Y and Z became 4:2:3.
Find the total number of ducks in all the 3 ponds now.