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Finding the Fourth Proportional to 87,429.60, 131,241.60 and 54,187.20

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Solution

The fourth proportional to 87,429.60, 131,241.60 and 54,187.20 is: 81,341.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,429.60 : 131,241.60 = 54,187.20 : x
  2. Step 2: Convert to fraction form
    87,429.60/131,241.60 = 54,187.20/x
  3. Step 3: Cross multiply
    87,429.60x = 131,241.60 × 54,187.20
  4. Step 4: Simplify right side
    87,429.60x = 7,111,614,827.52
  5. Step 5: Solve for x
    x = 7,111,614,827.52/87,429.60
  6. Step 6: Final answer
    x = 81,341.04

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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.