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Finding the Fourth Proportional to 87,645,319.20, 131,467,978.80 and 84,297,240.90

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Solution

The fourth proportional to 87,645,319.20, 131,467,978.80 and 84,297,240.90 is: 126,445,861.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,645,319.20 : 131,467,978.80 = 84,297,240.90 : x
  2. Step 2: Convert to fraction form
    87,645,319.20/131,467,978.80 = 84,297,240.90/x
  3. Step 3: Cross multiply
    87,645,319.20x = 131,467,978.80 × 84,297,240.90
  4. Step 4: Simplify right side
    87,645,319.20x = 11,082,387,879,539,694
  5. Step 5: Solve for x
    x = 11,082,387,879,539,694/87,645,319.20
  6. Step 6: Final answer
    x = 126,445,861.35

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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.