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Finding the Fourth Proportional to 92,385.90, 138,319.65 and 89,793.90

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Solution

The fourth proportional to 92,385.90, 138,319.65 and 89,793.90 is: 134,438.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,385.90 : 138,319.65 = 89,793.90 : x
  2. Step 2: Convert to fraction form
    92,385.90/138,319.65 = 89,793.90/x
  3. Step 3: Cross multiply
    92,385.90x = 138,319.65 × 89,793.90
  4. Step 4: Simplify right side
    92,385.90x = 12,420,260,820.14
  5. Step 5: Solve for x
    x = 12,420,260,820.14/92,385.90
  6. Step 6: Final answer
    x = 134,438.92

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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.