Home / 87,690.40-131,449.20-43,280.80

Finding the Fourth Proportional to 87,690.40, 131,449.20 and 43,280.80

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Solution

The fourth proportional to 87,690.40, 131,449.20 and 43,280.80 is: 64,878.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,690.40 : 131,449.20 = 43,280.80 : x
  2. Step 2: Convert to fraction form
    87,690.40/131,449.20 = 43,280.80/x
  3. Step 3: Cross multiply
    87,690.40x = 131,449.20 × 43,280.80
  4. Step 4: Simplify right side
    87,690.40x = 5,689,226,535.36
  5. Step 5: Solve for x
    x = 5,689,226,535.36/87,690.40
  6. Step 6: Final answer
    x = 64,878.56

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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.