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Finding the Fourth Proportional to 95.75, 143.57 and 63.21

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Solution

The fourth proportional to 95.75, 143.57 and 63.21 is: 94.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.75 : 143.57 = 63.21 : x
  2. Step 2: Convert to fraction form
    95.75/143.57 = 63.21/x
  3. Step 3: Cross multiply
    95.75x = 143.57 × 63.21
  4. Step 4: Simplify right side
    95.75x = 9,074.74
  5. Step 5: Solve for x
    x = 9,074.74/95.75
  6. Step 6: Final answer
    x = 94.78

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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.