Home / 83,663.72-115,397.68-71,001.28

Finding the Fourth Proportional to 83,663.72, 115,397.68 and 71,001.28

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Solution

The fourth proportional to 83,663.72, 115,397.68 and 71,001.28 is: 97,932.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,663.72 : 115,397.68 = 71,001.28 : x
  2. Step 2: Convert to fraction form
    83,663.72/115,397.68 = 71,001.28/x
  3. Step 3: Cross multiply
    83,663.72x = 115,397.68 × 71,001.28
  4. Step 4: Simplify right side
    83,663.72x = 8,193,382,989.03
  5. Step 5: Solve for x
    x = 8,193,382,989.03/83,663.72
  6. Step 6: Final answer
    x = 97,932.33

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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.