Home / 87,439.80-131,451.30-74,609.40

Finding the Fourth Proportional to 87,439.80, 131,451.30 and 74,609.40

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Solution

The fourth proportional to 87,439.80, 131,451.30 and 74,609.40 is: 112,162.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,439.80 : 131,451.30 = 74,609.40 : x
  2. Step 2: Convert to fraction form
    87,439.80/131,451.30 = 74,609.40/x
  3. Step 3: Cross multiply
    87,439.80x = 131,451.30 × 74,609.40
  4. Step 4: Simplify right side
    87,439.80x = 9,807,502,622.22
  5. Step 5: Solve for x
    x = 9,807,502,622.22/87,439.80
  6. Step 6: Final answer
    x = 112,162.91

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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.