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Finding the Third Proportional to 138,270 and 219,860

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Solution

The third proportional to 138,270 and 219,860 is: 349,594.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,270 : 219,860 = 219,860 : x
  2. Step 2: Convert to fraction form
    138,270/219,860 = 219,860/x
  3. Step 3: Cross multiply
    138,270x = 219,860 × 219,860
  4. Step 4: Simplify right side
    138,270x = 48,338,419,600
  5. Step 5: Solve for x
    x = 48,338,419,600/138,270
  6. Step 6: Final answer
    x = 349,594.41

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.