Construct the chain indices from the following price relatives of four commodities using geometric mean as an average.       Price Relatives of Commodities   Year A B C D 1951 14.6 21.6 250.0 119.0 1952 12.7 13.8 159.0 128.0 1953 12.1 15.0 130.0 111.0 1954 121.6 241.6 216.0 165.0

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