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Finding the Third Proportional to 102.94 and 138.69

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Solution

The third proportional to 102.94 and 138.69 is: 186.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.94 : 138.69 = 138.69 : x
  2. Step 2: Convert to fraction form
    102.94/138.69 = 138.69/x
  3. Step 3: Cross multiply
    102.94x = 138.69 × 138.69
  4. Step 4: Simplify right side
    102.94x = 19,234.22
  5. Step 5: Solve for x
    x = 19,234.22/102.94
  6. Step 6: Final answer
    x = 186.85

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.