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Finding the Fourth Proportional to 144.99, 200.97 and 142.47

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Solution

The fourth proportional to 144.99, 200.97 and 142.47 is: 197.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.99 : 200.97 = 142.47 : x
  2. Step 2: Convert to fraction form
    144.99/200.97 = 142.47/x
  3. Step 3: Cross multiply
    144.99x = 200.97 × 142.47
  4. Step 4: Simplify right side
    144.99x = 28,632.20
  5. Step 5: Solve for x
    x = 28,632.20/144.99
  6. Step 6: Final answer
    x = 197.48

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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.