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Finding the Third Proportional to 138,806 and 207,828

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Solution

The third proportional to 138,806 and 207,828 is: 311,171.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,806 : 207,828 = 207,828 : x
  2. Step 2: Convert to fraction form
    138,806/207,828 = 207,828/x
  3. Step 3: Cross multiply
    138,806x = 207,828 × 207,828
  4. Step 4: Simplify right side
    138,806x = 43,192,477,584
  5. Step 5: Solve for x
    x = 43,192,477,584/138,806
  6. Step 6: Final answer
    x = 311,171.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.