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Finding the Third Proportional to 81,628 and 126,136

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Solution

The third proportional to 81,628 and 126,136 is: 194,912.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,628 : 126,136 = 126,136 : x
  2. Step 2: Convert to fraction form
    81,628/126,136 = 126,136/x
  3. Step 3: Cross multiply
    81,628x = 126,136 × 126,136
  4. Step 4: Simplify right side
    81,628x = 15,910,290,496
  5. Step 5: Solve for x
    x = 15,910,290,496/81,628
  6. Step 6: Final answer
    x = 194,912.17

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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.