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Finding the Fourth Proportional to 50.27, 69.35 and 31.87

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Solution

The fourth proportional to 50.27, 69.35 and 31.87 is: 43.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.27 : 69.35 = 31.87 : x
  2. Step 2: Convert to fraction form
    50.27/69.35 = 31.87/x
  3. Step 3: Cross multiply
    50.27x = 69.35 × 31.87
  4. Step 4: Simplify right side
    50.27x = 2,209.85
  5. Step 5: Solve for x
    x = 2,209.85/50.27
  6. Step 6: Final answer
    x = 43.96

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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.