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Finding the Third Proportional to 117.15 and 166.88

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Solution

The third proportional to 117.15 and 166.88 is: 237.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.15 : 166.88 = 166.88 : x
  2. Step 2: Convert to fraction form
    117.15/166.88 = 166.88/x
  3. Step 3: Cross multiply
    117.15x = 166.88 × 166.88
  4. Step 4: Simplify right side
    117.15x = 27,848.57
  5. Step 5: Solve for x
    x = 27,848.57/117.15
  6. Step 6: Final answer
    x = 237.72

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.