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Finding the Fourth Proportional to 143.18, 198.41 and 141.49

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Solution

The fourth proportional to 143.18, 198.41 and 141.49 is: 196.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.18 : 198.41 = 141.49 : x
  2. Step 2: Convert to fraction form
    143.18/198.41 = 141.49/x
  3. Step 3: Cross multiply
    143.18x = 198.41 × 141.49
  4. Step 4: Simplify right side
    143.18x = 28,072.89
  5. Step 5: Solve for x
    x = 28,072.89/143.18
  6. Step 6: Final answer
    x = 196.07

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.