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Finding the Fourth Proportional to 50.67, 75.91 and 48.21

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Solution

The fourth proportional to 50.67, 75.91 and 48.21 is: 72.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.67 : 75.91 = 48.21 : x
  2. Step 2: Convert to fraction form
    50.67/75.91 = 48.21/x
  3. Step 3: Cross multiply
    50.67x = 75.91 × 48.21
  4. Step 4: Simplify right side
    50.67x = 3,659.62
  5. Step 5: Solve for x
    x = 3,659.62/50.67
  6. Step 6: Final answer
    x = 72.22

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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.