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Finding the Fourth Proportional to 92,720, 137,887.24 and 89,767.64

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Solution

The fourth proportional to 92,720, 137,887.24 and 89,767.64 is: 133,496.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,720 : 137,887.24 = 89,767.64 : x
  2. Step 2: Convert to fraction form
    92,720/137,887.24 = 89,767.64/x
  3. Step 3: Cross multiply
    92,720x = 137,887.24 × 89,767.64
  4. Step 4: Simplify right side
    92,720x = 12,377,812,120.91
  5. Step 5: Solve for x
    x = 12,377,812,120.91/92,720
  6. Step 6: Final answer
    x = 133,496.68

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.