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Finding the Fourth Proportional to 91,332.92, 136,979.13 and 28,142.66

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Solution

The fourth proportional to 91,332.92, 136,979.13 and 28,142.66 is: 42,207.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,332.92 : 136,979.13 = 28,142.66 : x
  2. Step 2: Convert to fraction form
    91,332.92/136,979.13 = 28,142.66/x
  3. Step 3: Cross multiply
    91,332.92x = 136,979.13 × 28,142.66
  4. Step 4: Simplify right side
    91,332.92x = 3,854,957,082.69
  5. Step 5: Solve for x
    x = 3,854,957,082.69/91,332.92
  6. Step 6: Final answer
    x = 42,207.75

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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.