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Finding the Third Proportional to 38,239.50 and 81,118.50

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Solution

The third proportional to 38,239.50 and 81,118.50 is: 172,078.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,239.50 : 81,118.50 = 81,118.50 : x
  2. Step 2: Convert to fraction form
    38,239.50/81,118.50 = 81,118.50/x
  3. Step 3: Cross multiply
    38,239.50x = 81,118.50 × 81,118.50
  4. Step 4: Simplify right side
    38,239.50x = 6,580,211,042.25
  5. Step 5: Solve for x
    x = 6,580,211,042.25/38,239.50
  6. Step 6: Final answer
    x = 172,078.90

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.