Home / 87,230.70-131,439.54-71,782.20

Finding the Fourth Proportional to 87,230.70, 131,439.54 and 71,782.20

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Solution

The fourth proportional to 87,230.70, 131,439.54 and 71,782.20 is: 108,161.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,230.70 : 131,439.54 = 71,782.20 : x
  2. Step 2: Convert to fraction form
    87,230.70/131,439.54 = 71,782.20/x
  3. Step 3: Cross multiply
    87,230.70x = 131,439.54 × 71,782.20
  4. Step 4: Simplify right side
    87,230.70x = 9,435,019,348.19
  5. Step 5: Solve for x
    x = 9,435,019,348.19/87,230.70
  6. Step 6: Final answer
    x = 108,161.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.