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Finding the Fourth Proportional to 87,563.60, 131,442.60 and 54,321.20

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Solution

The fourth proportional to 87,563.60, 131,442.60 and 54,321.20 is: 81,542.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,563.60 : 131,442.60 = 54,321.20 : x
  2. Step 2: Convert to fraction form
    87,563.60/131,442.60 = 54,321.20/x
  3. Step 3: Cross multiply
    87,563.60x = 131,442.60 × 54,321.20
  4. Step 4: Simplify right side
    87,563.60x = 7,140,119,763.12
  5. Step 5: Solve for x
    x = 7,140,119,763.12/87,563.60
  6. Step 6: Final answer
    x = 81,542.10

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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.