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Finding the Third Proportional to 56.81 and 79.73

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Solution

The third proportional to 56.81 and 79.73 is: 111.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.81 : 79.73 = 79.73 : x
  2. Step 2: Convert to fraction form
    56.81/79.73 = 79.73/x
  3. Step 3: Cross multiply
    56.81x = 79.73 × 79.73
  4. Step 4: Simplify right side
    56.81x = 6,357.57
  5. Step 5: Solve for x
    x = 6,357.57/56.81
  6. Step 6: Final answer
    x = 111.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.