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Finding the Third Proportional to 82,505 and 127,970

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Solution

The third proportional to 82,505 and 127,970 is: 198,488.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,505 : 127,970 = 127,970 : x
  2. Step 2: Convert to fraction form
    82,505/127,970 = 127,970/x
  3. Step 3: Cross multiply
    82,505x = 127,970 × 127,970
  4. Step 4: Simplify right side
    82,505x = 16,376,320,900
  5. Step 5: Solve for x
    x = 16,376,320,900/82,505
  6. Step 6: Final answer
    x = 198,488.83

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.