Home / 87,789.49-121,149.91-49,550.65

Finding the Fourth Proportional to 87,789.49, 121,149.91 and 49,550.65

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Solution

The fourth proportional to 87,789.49, 121,149.91 and 49,550.65 is: 68,380.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,789.49 : 121,149.91 = 49,550.65 : x
  2. Step 2: Convert to fraction form
    87,789.49/121,149.91 = 49,550.65/x
  3. Step 3: Cross multiply
    87,789.49x = 121,149.91 × 49,550.65
  4. Step 4: Simplify right side
    87,789.49x = 6,003,057,228.47
  5. Step 5: Solve for x
    x = 6,003,057,228.47/87,789.49
  6. Step 6: Final answer
    x = 68,380.14

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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.