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Finding the Fourth Proportional to 89,491.72, 123,498.80 and 51,251.88

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Solution

The fourth proportional to 89,491.72, 123,498.80 and 51,251.88 is: 70,727.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,491.72 : 123,498.80 = 51,251.88 : x
  2. Step 2: Convert to fraction form
    89,491.72/123,498.80 = 51,251.88/x
  3. Step 3: Cross multiply
    89,491.72x = 123,498.80 × 51,251.88
  4. Step 4: Simplify right side
    89,491.72x = 6,329,545,677.74
  5. Step 5: Solve for x
    x = 6,329,545,677.74/89,491.72
  6. Step 6: Final answer
    x = 70,727.72

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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.