Home / 87,478.26-120,720.50-49,238.56

Finding the Fourth Proportional to 87,478.26, 120,720.50 and 49,238.56

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Solution

The fourth proportional to 87,478.26, 120,720.50 and 49,238.56 is: 67,949.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,478.26 : 120,720.50 = 49,238.56 : x
  2. Step 2: Convert to fraction form
    87,478.26/120,720.50 = 49,238.56/x
  3. Step 3: Cross multiply
    87,478.26x = 120,720.50 × 49,238.56
  4. Step 4: Simplify right side
    87,478.26x = 5,944,103,582.48
  5. Step 5: Solve for x
    x = 5,944,103,582.48/87,478.26
  6. Step 6: Final answer
    x = 67,949.49

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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.