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Finding the Fourth Proportional to 143.74, 198.03 and 104.32

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Solution

The fourth proportional to 143.74, 198.03 and 104.32 is: 143.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.74 : 198.03 = 104.32 : x
  2. Step 2: Convert to fraction form
    143.74/198.03 = 104.32/x
  3. Step 3: Cross multiply
    143.74x = 198.03 × 104.32
  4. Step 4: Simplify right side
    143.74x = 20,658.49
  5. Step 5: Solve for x
    x = 20,658.49/143.74
  6. Step 6: Final answer
    x = 143.72

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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.