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Finding the Fourth Proportional to 50.62, 69.81 and 39.71

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Solution

The fourth proportional to 50.62, 69.81 and 39.71 is: 54.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.62 : 69.81 = 39.71 : x
  2. Step 2: Convert to fraction form
    50.62/69.81 = 39.71/x
  3. Step 3: Cross multiply
    50.62x = 69.81 × 39.71
  4. Step 4: Simplify right side
    50.62x = 2,772.16
  5. Step 5: Solve for x
    x = 2,772.16/50.62
  6. Step 6: Final answer
    x = 54.76

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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.