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Finding the Third Proportional to 103.13 and 118.13

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Solution

The third proportional to 103.13 and 118.13 is: 135.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.13 : 118.13 = 118.13 : x
  2. Step 2: Convert to fraction form
    103.13/118.13 = 118.13/x
  3. Step 3: Cross multiply
    103.13x = 118.13 × 118.13
  4. Step 4: Simplify right side
    103.13x = 13,953.52
  5. Step 5: Solve for x
    x = 13,953.52/103.13
  6. Step 6: Final answer
    x = 135.31

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Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.