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Finding the Fourth Proportional to 87,144.80, 130,522.80 and 67,359.20

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Solution

The fourth proportional to 87,144.80, 130,522.80 and 67,359.20 is: 100,888.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,144.80 : 130,522.80 = 67,359.20 : x
  2. Step 2: Convert to fraction form
    87,144.80/130,522.80 = 67,359.20/x
  3. Step 3: Cross multiply
    87,144.80x = 130,522.80 × 67,359.20
  4. Step 4: Simplify right side
    87,144.80x = 8,791,911,389.76
  5. Step 5: Solve for x
    x = 8,791,911,389.76/87,144.80
  6. Step 6: Final answer
    x = 100,888.54

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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.