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Finding the Fourth Proportional to 50.35, 75.43 and 42.21

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Solution

The fourth proportional to 50.35, 75.43 and 42.21 is: 63.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.35 : 75.43 = 42.21 : x
  2. Step 2: Convert to fraction form
    50.35/75.43 = 42.21/x
  3. Step 3: Cross multiply
    50.35x = 75.43 × 42.21
  4. Step 4: Simplify right side
    50.35x = 3,183.31
  5. Step 5: Solve for x
    x = 3,183.31/50.35
  6. Step 6: Final answer
    x = 63.22

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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.