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Finding the Third Proportional to 79.88 and 118.13

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Solution

The third proportional to 79.88 and 118.13 is: 174.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.88 : 118.13 = 118.13 : x
  2. Step 2: Convert to fraction form
    79.88/118.13 = 118.13/x
  3. Step 3: Cross multiply
    79.88x = 118.13 × 118.13
  4. Step 4: Simplify right side
    79.88x = 13,953.52
  5. Step 5: Solve for x
    x = 13,953.52/79.88
  6. Step 6: Final answer
    x = 174.69

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.