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Finding the Fourth Proportional to 87,492.80, 131,239.20 and 54,104.60

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Solution

The fourth proportional to 87,492.80, 131,239.20 and 54,104.60 is: 81,156.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,492.80 : 131,239.20 = 54,104.60 : x
  2. Step 2: Convert to fraction form
    87,492.80/131,239.20 = 54,104.60/x
  3. Step 3: Cross multiply
    87,492.80x = 131,239.20 × 54,104.60
  4. Step 4: Simplify right side
    87,492.80x = 7,100,644,420.32
  5. Step 5: Solve for x
    x = 7,100,644,420.32/87,492.80
  6. Step 6: Final answer
    x = 81,156.90

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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.