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Finding the Fourth Proportional to 89,663.34, 123,819.39 and 56,187.66

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Solution

The fourth proportional to 89,663.34, 123,819.39 and 56,187.66 is: 77,591.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,663.34 : 123,819.39 = 56,187.66 : x
  2. Step 2: Convert to fraction form
    89,663.34/123,819.39 = 56,187.66/x
  3. Step 3: Cross multiply
    89,663.34x = 123,819.39 × 56,187.66
  4. Step 4: Simplify right side
    89,663.34x = 6,957,121,786.73
  5. Step 5: Solve for x
    x = 6,957,121,786.73/89,663.34
  6. Step 6: Final answer
    x = 77,591.60

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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.