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Finding the Fourth Proportional to 91,909.92, 137,843.28 and 58,581.12

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Solution

The fourth proportional to 91,909.92, 137,843.28 and 58,581.12 is: 87,857.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,909.92 : 137,843.28 = 58,581.12 : x
  2. Step 2: Convert to fraction form
    91,909.92/137,843.28 = 58,581.12/x
  3. Step 3: Cross multiply
    91,909.92x = 137,843.28 × 58,581.12
  4. Step 4: Simplify right side
    91,909.92x = 8,075,013,726.87
  5. Step 5: Solve for x
    x = 8,075,013,726.87/91,909.92
  6. Step 6: Final answer
    x = 87,857.91

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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.