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Finding the Fourth Proportional to 144.47, 198.18 and 140.87

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Solution

The fourth proportional to 144.47, 198.18 and 140.87 is: 193.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.47 : 198.18 = 140.87 : x
  2. Step 2: Convert to fraction form
    144.47/198.18 = 140.87/x
  3. Step 3: Cross multiply
    144.47x = 198.18 × 140.87
  4. Step 4: Simplify right side
    144.47x = 27,918.11
  5. Step 5: Solve for x
    x = 27,918.11/144.47
  6. Step 6: Final answer
    x = 193.24

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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.