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Finding the Third Proportional to 106 and 117.75

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Solution

The third proportional to 106 and 117.75 is: 130.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    106 : 117.75 = 117.75 : x
  2. Step 2: Convert to fraction form
    106/117.75 = 117.75/x
  3. Step 3: Cross multiply
    106x = 117.75 × 117.75
  4. Step 4: Simplify right side
    106x = 13,865.06
  5. Step 5: Solve for x
    x = 13,865.06/106
  6. Step 6: Final answer
    x = 130.80

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Why These Related Problems?

These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.