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Finding the Fourth Proportional to 81,691.44, 112,730.04 and 45,882.96

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Solution

The fourth proportional to 81,691.44, 112,730.04 and 45,882.96 is: 63,316.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,691.44 : 112,730.04 = 45,882.96 : x
  2. Step 2: Convert to fraction form
    81,691.44/112,730.04 = 45,882.96/x
  3. Step 3: Cross multiply
    81,691.44x = 112,730.04 × 45,882.96
  4. Step 4: Simplify right side
    81,691.44x = 5,172,387,916.12
  5. Step 5: Solve for x
    x = 5,172,387,916.12/81,691.44
  6. Step 6: Final answer
    x = 63,316.16

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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.