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Finding the Fourth Proportional to 144.64, 198.68 and 142.62

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Solution

The fourth proportional to 144.64, 198.68 and 142.62 is: 195.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.64 : 198.68 = 142.62 : x
  2. Step 2: Convert to fraction form
    144.64/198.68 = 142.62/x
  3. Step 3: Cross multiply
    144.64x = 198.68 × 142.62
  4. Step 4: Simplify right side
    144.64x = 28,335.74
  5. Step 5: Solve for x
    x = 28,335.74/144.64
  6. Step 6: Final answer
    x = 195.91

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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.