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Finding the Fourth Proportional to 144.50, 198.10 and 141.90

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Solution

The fourth proportional to 144.50, 198.10 and 141.90 is: 194.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.50 : 198.10 = 141.90 : x
  2. Step 2: Convert to fraction form
    144.50/198.10 = 141.90/x
  3. Step 3: Cross multiply
    144.50x = 198.10 × 141.90
  4. Step 4: Simplify right side
    144.50x = 28,110.39
  5. Step 5: Solve for x
    x = 28,110.39/144.50
  6. Step 6: Final answer
    x = 194.54

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.