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Finding the Fourth Proportional to 143.54, 198.91 and 141.80

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Solution

The fourth proportional to 143.54, 198.91 and 141.80 is: 196.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.54 : 198.91 = 141.80 : x
  2. Step 2: Convert to fraction form
    143.54/198.91 = 141.80/x
  3. Step 3: Cross multiply
    143.54x = 198.91 × 141.80
  4. Step 4: Simplify right side
    143.54x = 28,205.44
  5. Step 5: Solve for x
    x = 28,205.44/143.54
  6. Step 6: Final answer
    x = 196.50

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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.