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Finding the Fourth Proportional to 89,167.52, 133,917.78 and 78,497.64

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Solution

The fourth proportional to 89,167.52, 133,917.78 and 78,497.64 is: 117,893.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,167.52 : 133,917.78 = 78,497.64 : x
  2. Step 2: Convert to fraction form
    89,167.52/133,917.78 = 78,497.64/x
  3. Step 3: Cross multiply
    89,167.52x = 133,917.78 × 78,497.64
  4. Step 4: Simplify right side
    89,167.52x = 10,512,229,684.04
  5. Step 5: Solve for x
    x = 10,512,229,684.04/89,167.52
  6. Step 6: Final answer
    x = 117,893.04

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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.