Home / 87,707.85-131,560.61-21,147.44

Finding the Fourth Proportional to 87,707.85, 131,560.61 and 21,147.44

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Solution

The fourth proportional to 87,707.85, 131,560.61 and 21,147.44 is: 31,720.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,707.85 : 131,560.61 = 21,147.44 : x
  2. Step 2: Convert to fraction form
    87,707.85/131,560.61 = 21,147.44/x
  3. Step 3: Cross multiply
    87,707.85x = 131,560.61 × 21,147.44
  4. Step 4: Simplify right side
    87,707.85x = 2,782,169,448.54
  5. Step 5: Solve for x
    x = 2,782,169,448.54/87,707.85
  6. Step 6: Final answer
    x = 31,720.87

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1.5x scale

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.