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Finding the Third Proportional to 79.75 and 105.94

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Solution

The third proportional to 79.75 and 105.94 is: 140.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.75 : 105.94 = 105.94 : x
  2. Step 2: Convert to fraction form
    79.75/105.94 = 105.94/x
  3. Step 3: Cross multiply
    79.75x = 105.94 × 105.94
  4. Step 4: Simplify right side
    79.75x = 11,222.75
  5. Step 5: Solve for x
    x = 11,222.75/79.75
  6. Step 6: Final answer
    x = 140.72

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.