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Finding the Third Proportional to 68.34 and 79.73

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Solution

The third proportional to 68.34 and 79.73 is: 93.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.34 : 79.73 = 79.73 : x
  2. Step 2: Convert to fraction form
    68.34/79.73 = 79.73/x
  3. Step 3: Cross multiply
    68.34x = 79.73 × 79.73
  4. Step 4: Simplify right side
    68.34x = 6,357.57
  5. Step 5: Solve for x
    x = 6,357.57/68.34
  6. Step 6: Final answer
    x = 93.02

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Why These Related Problems?

These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.