Home / 87,231.10-120,385.12-49,507.78

Finding the Fourth Proportional to 87,231.10, 120,385.12 and 49,507.78

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Solution

The fourth proportional to 87,231.10, 120,385.12 and 49,507.78 is: 68,324.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,231.10 : 120,385.12 = 49,507.78 : x
  2. Step 2: Convert to fraction form
    87,231.10/120,385.12 = 49,507.78/x
  3. Step 3: Cross multiply
    87,231.10x = 120,385.12 × 49,507.78
  4. Step 4: Simplify right side
    87,231.10x = 5,960,000,036.23
  5. Step 5: Solve for x
    x = 5,960,000,036.23/87,231.10
  6. Step 6: Final answer
    x = 68,324.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.