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Finding the Fourth Proportional to 77.27, 106.67 and 49.66

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Solution

The fourth proportional to 77.27, 106.67 and 49.66 is: 68.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.27 : 106.67 = 49.66 : x
  2. Step 2: Convert to fraction form
    77.27/106.67 = 49.66/x
  3. Step 3: Cross multiply
    77.27x = 106.67 × 49.66
  4. Step 4: Simplify right side
    77.27x = 5,296.72
  5. Step 5: Solve for x
    x = 5,296.72/77.27
  6. Step 6: Final answer
    x = 68.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.