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Finding the Fourth Proportional to 50.05, 75.21 and 42.49

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Solution

The fourth proportional to 50.05, 75.21 and 42.49 is: 63.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.05 : 75.21 = 42.49 : x
  2. Step 2: Convert to fraction form
    50.05/75.21 = 42.49/x
  3. Step 3: Cross multiply
    50.05x = 75.21 × 42.49
  4. Step 4: Simplify right side
    50.05x = 3,195.67
  5. Step 5: Solve for x
    x = 3,195.67/50.05
  6. Step 6: Final answer
    x = 63.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.