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Finding the Fourth Proportional to 118,880.10, 178,221.87 and 92,700.90

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Solution

The fourth proportional to 118,880.10, 178,221.87 and 92,700.90 is: 138,974.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,880.10 : 178,221.87 = 92,700.90 : x
  2. Step 2: Convert to fraction form
    118,880.10/178,221.87 = 92,700.90/x
  3. Step 3: Cross multiply
    118,880.10x = 178,221.87 × 92,700.90
  4. Step 4: Simplify right side
    118,880.10x = 16,521,327,748.68
  5. Step 5: Solve for x
    x = 16,521,327,748.68/118,880.10
  6. Step 6: Final answer
    x = 138,974.71

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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.