Home / 87,675.10-120,989.20-49,434.30

Finding the Fourth Proportional to 87,675.10, 120,989.20 and 49,434.30

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Solution

The fourth proportional to 87,675.10, 120,989.20 and 49,434.30 is: 68,217.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,675.10 : 120,989.20 = 49,434.30 : x
  2. Step 2: Convert to fraction form
    87,675.10/120,989.20 = 49,434.30/x
  3. Step 3: Cross multiply
    87,675.10x = 120,989.20 × 49,434.30
  4. Step 4: Simplify right side
    87,675.10x = 5,981,016,409.56
  5. Step 5: Solve for x
    x = 5,981,016,409.56/87,675.10
  6. Step 6: Final answer
    x = 68,217.96

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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.