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Finding the Third Proportional to 38,279.50 and 81,257

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Solution

The third proportional to 38,279.50 and 81,257 is: 172,486.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,279.50 : 81,257 = 81,257 : x
  2. Step 2: Convert to fraction form
    38,279.50/81,257 = 81,257/x
  3. Step 3: Cross multiply
    38,279.50x = 81,257 × 81,257
  4. Step 4: Simplify right side
    38,279.50x = 6,602,700,049
  5. Step 5: Solve for x
    x = 6,602,700,049/38,279.50
  6. Step 6: Final answer
    x = 172,486.58

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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.