Home / 87,721.91-121,053.51-49,480.90

Finding the Fourth Proportional to 87,721.91, 121,053.51 and 49,480.90

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Solution

The fourth proportional to 87,721.91, 121,053.51 and 49,480.90 is: 68,282.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,721.91 : 121,053.51 = 49,480.90 : x
  2. Step 2: Convert to fraction form
    87,721.91/121,053.51 = 49,480.90/x
  3. Step 3: Cross multiply
    87,721.91x = 121,053.51 × 49,480.90
  4. Step 4: Simplify right side
    87,721.91x = 5,989,836,799.95
  5. Step 5: Solve for x
    x = 5,989,836,799.95/87,721.91
  6. Step 6: Final answer
    x = 68,282.11

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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.