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Finding the Fourth Proportional to 89,862.60, 134,793.90 and 81,114.60

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Solution

The fourth proportional to 89,862.60, 134,793.90 and 81,114.60 is: 121,671.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,862.60 : 134,793.90 = 81,114.60 : x
  2. Step 2: Convert to fraction form
    89,862.60/134,793.90 = 81,114.60/x
  3. Step 3: Cross multiply
    89,862.60x = 134,793.90 × 81,114.60
  4. Step 4: Simplify right side
    89,862.60x = 10,933,753,280.94
  5. Step 5: Solve for x
    x = 10,933,753,280.94/89,862.60
  6. Step 6: Final answer
    x = 121,671.90

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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.