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Finding the Fourth Proportional to 95.42, 143.15 and 49.80

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Solution

The fourth proportional to 95.42, 143.15 and 49.80 is: 74.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.42 : 143.15 = 49.80 : x
  2. Step 2: Convert to fraction form
    95.42/143.15 = 49.80/x
  3. Step 3: Cross multiply
    95.42x = 143.15 × 49.80
  4. Step 4: Simplify right side
    95.42x = 7,128.15
  5. Step 5: Solve for x
    x = 7,128.15/95.42
  6. Step 6: Final answer
    x = 74.71

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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.