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Finding the Fourth Proportional to 63.92, 88.12 and 50.69

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Solution

The fourth proportional to 63.92, 88.12 and 50.69 is: 69.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.92 : 88.12 = 50.69 : x
  2. Step 2: Convert to fraction form
    63.92/88.12 = 50.69/x
  3. Step 3: Cross multiply
    63.92x = 88.12 × 50.69
  4. Step 4: Simplify right side
    63.92x = 4,467.09
  5. Step 5: Solve for x
    x = 4,467.09/63.92
  6. Step 6: Final answer
    x = 69.88

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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.