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Finding the Fourth Proportional to 91,489.28, 137,299.52 and 38,935.68

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Solution

The fourth proportional to 91,489.28, 137,299.52 and 38,935.68 is: 58,431.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,489.28 : 137,299.52 = 38,935.68 : x
  2. Step 2: Convert to fraction form
    91,489.28/137,299.52 = 38,935.68/x
  3. Step 3: Cross multiply
    91,489.28x = 137,299.52 × 38,935.68
  4. Step 4: Simplify right side
    91,489.28x = 5,345,850,174.87
  5. Step 5: Solve for x
    x = 5,345,850,174.87/91,489.28
  6. Step 6: Final answer
    x = 58,431.44

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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.