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Finding the Third Proportional to 38,702 and 81,112

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Solution

The third proportional to 38,702 and 81,112 is: 169,995.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,702 : 81,112 = 81,112 : x
  2. Step 2: Convert to fraction form
    38,702/81,112 = 81,112/x
  3. Step 3: Cross multiply
    38,702x = 81,112 × 81,112
  4. Step 4: Simplify right side
    38,702x = 6,579,156,544
  5. Step 5: Solve for x
    x = 6,579,156,544/38,702
  6. Step 6: Final answer
    x = 169,995.26

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.