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Finding the Fourth Proportional to 144.20, 199 and 94.42

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Solution

The fourth proportional to 144.20, 199 and 94.42 is: 130.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.20 : 199 = 94.42 : x
  2. Step 2: Convert to fraction form
    144.20/199 = 94.42/x
  3. Step 3: Cross multiply
    144.20x = 199 × 94.42
  4. Step 4: Simplify right side
    144.20x = 18,789.58
  5. Step 5: Solve for x
    x = 18,789.58/144.20
  6. Step 6: Final answer
    x = 130.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.