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Finding the Third Proportional to 38,394 and 78,691.50

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Solution

The third proportional to 38,394 and 78,691.50 is: 161,284.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,394 : 78,691.50 = 78,691.50 : x
  2. Step 2: Convert to fraction form
    38,394/78,691.50 = 78,691.50/x
  3. Step 3: Cross multiply
    38,394x = 78,691.50 × 78,691.50
  4. Step 4: Simplify right side
    38,394x = 6,192,352,172.25
  5. Step 5: Solve for x
    x = 6,192,352,172.25/38,394
  6. Step 6: Final answer
    x = 161,284.37

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.