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Finding the Third Proportional to 107.13 and 115.75

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Solution

The third proportional to 107.13 and 115.75 is: 125.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.13 : 115.75 = 115.75 : x
  2. Step 2: Convert to fraction form
    107.13/115.75 = 115.75/x
  3. Step 3: Cross multiply
    107.13x = 115.75 × 115.75
  4. Step 4: Simplify right side
    107.13x = 13,398.06
  5. Step 5: Solve for x
    x = 13,398.06/107.13
  6. Step 6: Final answer
    x = 125.07

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Why These Related Problems?

These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.