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Finding the Fourth Proportional to 83,272.66, 124,908.90 and 20,943.16

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Solution

The fourth proportional to 83,272.66, 124,908.90 and 20,943.16 is: 31,414.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,272.66 : 124,908.90 = 20,943.16 : x
  2. Step 2: Convert to fraction form
    83,272.66/124,908.90 = 20,943.16/x
  3. Step 3: Cross multiply
    83,272.66x = 124,908.90 × 20,943.16
  4. Step 4: Simplify right side
    83,272.66x = 2,615,987,078.12
  5. Step 5: Solve for x
    x = 2,615,987,078.12/83,272.66
  6. Step 6: Final answer
    x = 31,414.72

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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.