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Finding the Fourth Proportional to 50.39, 69.56 and 42.19

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Solution

The fourth proportional to 50.39, 69.56 and 42.19 is: 58.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.39 : 69.56 = 42.19 : x
  2. Step 2: Convert to fraction form
    50.39/69.56 = 42.19/x
  3. Step 3: Cross multiply
    50.39x = 69.56 × 42.19
  4. Step 4: Simplify right side
    50.39x = 2,934.70
  5. Step 5: Solve for x
    x = 2,934.70/50.39
  6. Step 6: Final answer
    x = 58.24

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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.