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Finding the Fourth Proportional to 80,613.43, 120,921.36 and 30,696.29

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Solution

The fourth proportional to 80,613.43, 120,921.36 and 30,696.29 is: 46,044.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,613.43 : 120,921.36 = 30,696.29 : x
  2. Step 2: Convert to fraction form
    80,613.43/120,921.36 = 30,696.29/x
  3. Step 3: Cross multiply
    80,613.43x = 120,921.36 × 30,696.29
  4. Step 4: Simplify right side
    80,613.43x = 3,711,837,207.58
  5. Step 5: Solve for x
    x = 3,711,837,207.58/80,613.43
  6. Step 6: Final answer
    x = 46,044.90

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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.