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Finding the Fourth Proportional to 81,264.28, 121,877.28 and 45,740.71

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Solution

The fourth proportional to 81,264.28, 121,877.28 and 45,740.71 is: 68,600.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,264.28 : 121,877.28 = 45,740.71 : x
  2. Step 2: Convert to fraction form
    81,264.28/121,877.28 = 45,740.71/x
  3. Step 3: Cross multiply
    81,264.28x = 121,877.28 × 45,740.71
  4. Step 4: Simplify right side
    81,264.28x = 5,574,753,320.07
  5. Step 5: Solve for x
    x = 5,574,753,320.07/81,264.28
  6. Step 6: Final answer
    x = 68,600.29

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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.