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Finding the Fourth Proportional to 88,691.40, 133,037.10 and 77,286.60

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Solution

The fourth proportional to 88,691.40, 133,037.10 and 77,286.60 is: 115,929.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,691.40 : 133,037.10 = 77,286.60 : x
  2. Step 2: Convert to fraction form
    88,691.40/133,037.10 = 77,286.60/x
  3. Step 3: Cross multiply
    88,691.40x = 133,037.10 × 77,286.60
  4. Step 4: Simplify right side
    88,691.40x = 10,281,985,132.86
  5. Step 5: Solve for x
    x = 10,281,985,132.86/88,691.40
  6. Step 6: Final answer
    x = 115,929.90

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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.