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Finding the Fourth Proportional to 143.82, 197.86 and 127.14

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Solution

The fourth proportional to 143.82, 197.86 and 127.14 is: 174.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.82 : 197.86 = 127.14 : x
  2. Step 2: Convert to fraction form
    143.82/197.86 = 127.14/x
  3. Step 3: Cross multiply
    143.82x = 197.86 × 127.14
  4. Step 4: Simplify right side
    143.82x = 25,155.92
  5. Step 5: Solve for x
    x = 25,155.92/143.82
  6. Step 6: Final answer
    x = 174.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.