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Finding the Fourth Proportional to 144.38, 199.13 and 111.57

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Solution

The fourth proportional to 144.38, 199.13 and 111.57 is: 153.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.38 : 199.13 = 111.57 : x
  2. Step 2: Convert to fraction form
    144.38/199.13 = 111.57/x
  3. Step 3: Cross multiply
    144.38x = 199.13 × 111.57
  4. Step 4: Simplify right side
    144.38x = 22,216.38
  5. Step 5: Solve for x
    x = 22,216.38/144.38
  6. Step 6: Final answer
    x = 153.88

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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.