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Finding the Third Proportional to 138 and 193

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Solution

The third proportional to 138 and 193 is: 269.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    138 : 193 = 193 : x
  2. Step 2: Convert to fraction form
    138/193 = 193/x
  3. Step 3: Cross multiply
    138x = 193 × 193
  4. Step 4: Simplify right side
    138x = 37,249
  5. Step 5: Solve for x
    x = 37,249/138
  6. Step 6: Final answer
    x = 269.92

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.