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Finding the Third Proportional to 81,252 and 115,830

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Solution

The third proportional to 81,252 and 115,830 is: 165,123.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,252 : 115,830 = 115,830 : x
  2. Step 2: Convert to fraction form
    81,252/115,830 = 115,830/x
  3. Step 3: Cross multiply
    81,252x = 115,830 × 115,830
  4. Step 4: Simplify right side
    81,252x = 13,416,588,900
  5. Step 5: Solve for x
    x = 13,416,588,900/81,252
  6. Step 6: Final answer
    x = 165,123.18

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.