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Finding the Fourth Proportional to 144.52, 198.21 and 136.68

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Solution

The fourth proportional to 144.52, 198.21 and 136.68 is: 187.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.52 : 198.21 = 136.68 : x
  2. Step 2: Convert to fraction form
    144.52/198.21 = 136.68/x
  3. Step 3: Cross multiply
    144.52x = 198.21 × 136.68
  4. Step 4: Simplify right side
    144.52x = 27,091.11
  5. Step 5: Solve for x
    x = 27,091.11/144.52
  6. Step 6: Final answer
    x = 187.46

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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.