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Finding the Third Proportional to 38,100 and 81,868

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Solution

The third proportional to 38,100 and 81,868 is: 175,915.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,100 : 81,868 = 81,868 : x
  2. Step 2: Convert to fraction form
    38,100/81,868 = 81,868/x
  3. Step 3: Cross multiply
    38,100x = 81,868 × 81,868
  4. Step 4: Simplify right side
    38,100x = 6,702,369,424
  5. Step 5: Solve for x
    x = 6,702,369,424/38,100
  6. Step 6: Final answer
    x = 175,915.21

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.