Home / 87,681.28-131,509.50-28,517.80

Finding the Fourth Proportional to 87,681.28, 131,509.50 and 28,517.80

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Solution

The fourth proportional to 87,681.28, 131,509.50 and 28,517.80 is: 42,772.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,681.28 : 131,509.50 = 28,517.80 : x
  2. Step 2: Convert to fraction form
    87,681.28/131,509.50 = 28,517.80/x
  3. Step 3: Cross multiply
    87,681.28x = 131,509.50 × 28,517.80
  4. Step 4: Simplify right side
    87,681.28x = 3,750,361,619.10
  5. Step 5: Solve for x
    x = 3,750,361,619.10/87,681.28
  6. Step 6: Final answer
    x = 42,772.66

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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.