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Finding the Fourth Proportional to 67.82, 102.07 and 50.79

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Solution

The fourth proportional to 67.82, 102.07 and 50.79 is: 76.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.82 : 102.07 = 50.79 : x
  2. Step 2: Convert to fraction form
    67.82/102.07 = 50.79/x
  3. Step 3: Cross multiply
    67.82x = 102.07 × 50.79
  4. Step 4: Simplify right side
    67.82x = 5,184.14
  5. Step 5: Solve for x
    x = 5,184.14/67.82
  6. Step 6: Final answer
    x = 76.44

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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.