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Finding the Fourth Proportional to 143.96, 198.79 and 136.28

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Solution

The fourth proportional to 143.96, 198.79 and 136.28 is: 188.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.96 : 198.79 = 136.28 : x
  2. Step 2: Convert to fraction form
    143.96/198.79 = 136.28/x
  3. Step 3: Cross multiply
    143.96x = 198.79 × 136.28
  4. Step 4: Simplify right side
    143.96x = 27,091.10
  5. Step 5: Solve for x
    x = 27,091.10/143.96
  6. Step 6: Final answer
    x = 188.19

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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.