Home / 87,690.40-131,535.60-80,432.80

Finding the Fourth Proportional to 87,690.40, 131,535.60 and 80,432.80

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Solution

The fourth proportional to 87,690.40, 131,535.60 and 80,432.80 is: 120,649.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,690.40 : 131,535.60 = 80,432.80 : x
  2. Step 2: Convert to fraction form
    87,690.40/131,535.60 = 80,432.80/x
  3. Step 3: Cross multiply
    87,690.40x = 131,535.60 × 80,432.80
  4. Step 4: Simplify right side
    87,690.40x = 10,579,776,607.68
  5. Step 5: Solve for x
    x = 10,579,776,607.68/87,690.40
  6. Step 6: Final answer
    x = 120,649.20

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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.