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Finding the Fourth Proportional to 77.93, 117.49 and 67.73

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Solution

The fourth proportional to 77.93, 117.49 and 67.73 is: 102.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.93 : 117.49 = 67.73 : x
  2. Step 2: Convert to fraction form
    77.93/117.49 = 67.73/x
  3. Step 3: Cross multiply
    77.93x = 117.49 × 67.73
  4. Step 4: Simplify right side
    77.93x = 7,957.72
  5. Step 5: Solve for x
    x = 7,957.72/77.93
  6. Step 6: Final answer
    x = 102.12

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.