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Finding the Third Proportional to 103.78 and 150.19

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Solution

The third proportional to 103.78 and 150.19 is: 217.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.78 : 150.19 = 150.19 : x
  2. Step 2: Convert to fraction form
    103.78/150.19 = 150.19/x
  3. Step 3: Cross multiply
    103.78x = 150.19 × 150.19
  4. Step 4: Simplify right side
    103.78x = 22,556.29
  5. Step 5: Solve for x
    x = 22,556.29/103.78
  6. Step 6: Final answer
    x = 217.34

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.