Home / 87,432.40-131,148.60-66,437.20

Finding the Fourth Proportional to 87,432.40, 131,148.60 and 66,437.20

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Solution

The fourth proportional to 87,432.40, 131,148.60 and 66,437.20 is: 99,655.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,432.40 : 131,148.60 = 66,437.20 : x
  2. Step 2: Convert to fraction form
    87,432.40/131,148.60 = 66,437.20/x
  3. Step 3: Cross multiply
    87,432.40x = 131,148.60 × 66,437.20
  4. Step 4: Simplify right side
    87,432.40x = 8,713,145,767.92
  5. Step 5: Solve for x
    x = 8,713,145,767.92/87,432.40
  6. Step 6: Final answer
    x = 99,655.80

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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.