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Finding the Third Proportional to 81,866 and 131,331

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Solution

The third proportional to 81,866 and 131,331 is: 210,683.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,866 : 131,331 = 131,331 : x
  2. Step 2: Convert to fraction form
    81,866/131,331 = 131,331/x
  3. Step 3: Cross multiply
    81,866x = 131,331 × 131,331
  4. Step 4: Simplify right side
    81,866x = 17,247,831,561
  5. Step 5: Solve for x
    x = 17,247,831,561/81,866
  6. Step 6: Final answer
    x = 210,683.70

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.