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Finding the Fourth Proportional to 91,481.28, 137,287.52 and 38,927.68

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Solution

The fourth proportional to 91,481.28, 137,287.52 and 38,927.68 is: 58,419.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,481.28 : 137,287.52 = 38,927.68 : x
  2. Step 2: Convert to fraction form
    91,481.28/137,287.52 = 38,927.68/x
  3. Step 3: Cross multiply
    91,481.28x = 137,287.52 × 38,927.68
  4. Step 4: Simplify right side
    91,481.28x = 5,344,284,646.55
  5. Step 5: Solve for x
    x = 5,344,284,646.55/91,481.28
  6. Step 6: Final answer
    x = 58,419.43

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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.