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Finding the Fourth Proportional to 69.17, 103.83 and 67.79

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Solution

The fourth proportional to 69.17, 103.83 and 67.79 is: 101.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.17 : 103.83 = 67.79 : x
  2. Step 2: Convert to fraction form
    69.17/103.83 = 67.79/x
  3. Step 3: Cross multiply
    69.17x = 103.83 × 67.79
  4. Step 4: Simplify right side
    69.17x = 7,038.12
  5. Step 5: Solve for x
    x = 7,038.12/69.17
  6. Step 6: Final answer
    x = 101.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.