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Finding the Third Proportional to 100.75 and 107.88

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Solution

The third proportional to 100.75 and 107.88 is: 115.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.75 : 107.88 = 107.88 : x
  2. Step 2: Convert to fraction form
    100.75/107.88 = 107.88/x
  3. Step 3: Cross multiply
    100.75x = 107.88 × 107.88
  4. Step 4: Simplify right side
    100.75x = 11,637.02
  5. Step 5: Solve for x
    x = 11,637.02/100.75
  6. Step 6: Final answer
    x = 115.50

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Why These Related Problems?

These problems maintain the same ratio (1.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.