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Finding the Third Proportional to 138,910 and 207,450

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Solution

The third proportional to 138,910 and 207,450 is: 309,808.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,910 : 207,450 = 207,450 : x
  2. Step 2: Convert to fraction form
    138,910/207,450 = 207,450/x
  3. Step 3: Cross multiply
    138,910x = 207,450 × 207,450
  4. Step 4: Simplify right side
    138,910x = 43,035,502,500
  5. Step 5: Solve for x
    x = 43,035,502,500/138,910
  6. Step 6: Final answer
    x = 309,808.53

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.