Home / 87,448.20-131,139.90-28,285.80

Finding the Fourth Proportional to 87,448.20, 131,139.90 and 28,285.80

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Solution

The fourth proportional to 87,448.20, 131,139.90 and 28,285.80 is: 42,418.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,448.20 : 131,139.90 = 28,285.80 : x
  2. Step 2: Convert to fraction form
    87,448.20/131,139.90 = 28,285.80/x
  3. Step 3: Cross multiply
    87,448.20x = 131,139.90 × 28,285.80
  4. Step 4: Simplify right side
    87,448.20x = 3,709,396,983.42
  5. Step 5: Solve for x
    x = 3,709,396,983.42/87,448.20
  6. Step 6: Final answer
    x = 42,418.22

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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.