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Finding the Fourth Proportional to 157,372.71, 217,167.54 and 89,389.47

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Solution

The fourth proportional to 157,372.71, 217,167.54 and 89,389.47 is: 123,353.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,372.71 : 217,167.54 = 89,389.47 : x
  2. Step 2: Convert to fraction form
    157,372.71/217,167.54 = 89,389.47/x
  3. Step 3: Cross multiply
    157,372.71x = 217,167.54 × 89,389.47
  4. Step 4: Simplify right side
    157,372.71x = 19,412,491,301.80
  5. Step 5: Solve for x
    x = 19,412,491,301.80/157,372.71
  6. Step 6: Final answer
    x = 123,353.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.