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Finding the Fourth Proportional to 87,385.80, 131,078.70 and 80,627.40

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Solution

The fourth proportional to 87,385.80, 131,078.70 and 80,627.40 is: 120,941.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,385.80 : 131,078.70 = 80,627.40 : x
  2. Step 2: Convert to fraction form
    87,385.80/131,078.70 = 80,627.40/x
  3. Step 3: Cross multiply
    87,385.80x = 131,078.70 × 80,627.40
  4. Step 4: Simplify right side
    87,385.80x = 10,568,534,776.38
  5. Step 5: Solve for x
    x = 10,568,534,776.38/87,385.80
  6. Step 6: Final answer
    x = 120,941.10

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1.5x scale

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.