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Finding the Fourth Proportional to 69.82, 104.68 and 33.72

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Solution

The fourth proportional to 69.82, 104.68 and 33.72 is: 50.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.82 : 104.68 = 33.72 : x
  2. Step 2: Convert to fraction form
    69.82/104.68 = 33.72/x
  3. Step 3: Cross multiply
    69.82x = 104.68 × 33.72
  4. Step 4: Simplify right side
    69.82x = 3,529.81
  5. Step 5: Solve for x
    x = 3,529.81/69.82
  6. Step 6: Final answer
    x = 50.56

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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.