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Finding the Fourth Proportional to 50.60, 69.70 and 39.08

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Solution

The fourth proportional to 50.60, 69.70 and 39.08 is: 53.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.60 : 69.70 = 39.08 : x
  2. Step 2: Convert to fraction form
    50.60/69.70 = 39.08/x
  3. Step 3: Cross multiply
    50.60x = 69.70 × 39.08
  4. Step 4: Simplify right side
    50.60x = 2,723.88
  5. Step 5: Solve for x
    x = 2,723.88/50.60
  6. Step 6: Final answer
    x = 53.83

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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.