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Finding the Fourth Proportional to 121,882.71, 168,127.65 and 73,451.61

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Solution

The fourth proportional to 121,882.71, 168,127.65 and 73,451.61 is: 101,320.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,882.71 : 168,127.65 = 73,451.61 : x
  2. Step 2: Convert to fraction form
    121,882.71/168,127.65 = 73,451.61/x
  3. Step 3: Cross multiply
    121,882.71x = 168,127.65 × 73,451.61
  4. Step 4: Simplify right side
    121,882.71x = 12,349,246,578.02
  5. Step 5: Solve for x
    x = 12,349,246,578.02/121,882.71
  6. Step 6: Final answer
    x = 101,320.74

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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.