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Finding the Fourth Proportional to 87,699.92, 131,520.11 and 28,520.91

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Solution

The fourth proportional to 87,699.92, 131,520.11 and 28,520.91 is: 42,771.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,699.92 : 131,520.11 = 28,520.91 : x
  2. Step 2: Convert to fraction form
    87,699.92/131,520.11 = 28,520.91/x
  3. Step 3: Cross multiply
    87,699.92x = 131,520.11 × 28,520.91
  4. Step 4: Simplify right side
    87,699.92x = 3,751,073,077.90
  5. Step 5: Solve for x
    x = 3,751,073,077.90/87,699.92
  6. Step 6: Final answer
    x = 42,771.68

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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.