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Finding the Third Proportional to 49.69 and 81

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Solution

The third proportional to 49.69 and 81 is: 132.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.69 : 81 = 81 : x
  2. Step 2: Convert to fraction form
    49.69/81 = 81/x
  3. Step 3: Cross multiply
    49.69x = 81 × 81
  4. Step 4: Simplify right side
    49.69x = 6,561
  5. Step 5: Solve for x
    x = 6,561/49.69
  6. Step 6: Final answer
    x = 132.05

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Why These Related Problems?

These problems maintain the same ratio (1.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.