Home / 87,630.20-131,445.30-72,855.80

Finding the Fourth Proportional to 87,630.20, 131,445.30 and 72,855.80

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Solution

The fourth proportional to 87,630.20, 131,445.30 and 72,855.80 is: 109,283.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,630.20 : 131,445.30 = 72,855.80 : x
  2. Step 2: Convert to fraction form
    87,630.20/131,445.30 = 72,855.80/x
  3. Step 3: Cross multiply
    87,630.20x = 131,445.30 × 72,855.80
  4. Step 4: Simplify right side
    87,630.20x = 9,576,552,487.74
  5. Step 5: Solve for x
    x = 9,576,552,487.74/87,630.20
  6. Step 6: Final answer
    x = 109,283.70

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1.5x scale

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.