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Finding the Fourth Proportional to 159,913.63, 239,871.26 and 66,419.47

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Solution

The fourth proportional to 159,913.63, 239,871.26 and 66,419.47 is: 99,629.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,913.63 : 239,871.26 = 66,419.47 : x
  2. Step 2: Convert to fraction form
    159,913.63/239,871.26 = 66,419.47/x
  3. Step 3: Cross multiply
    159,913.63x = 239,871.26 × 66,419.47
  4. Step 4: Simplify right side
    159,913.63x = 15,932,121,957.43
  5. Step 5: Solve for x
    x = 15,932,121,957.43/159,913.63
  6. Step 6: Final answer
    x = 99,629.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.