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Finding the Fourth Proportional to 143.39, 196.67 and 135.55

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Solution

The fourth proportional to 143.39, 196.67 and 135.55 is: 185.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.39 : 196.67 = 135.55 : x
  2. Step 2: Convert to fraction form
    143.39/196.67 = 135.55/x
  3. Step 3: Cross multiply
    143.39x = 196.67 × 135.55
  4. Step 4: Simplify right side
    143.39x = 26,658.47
  5. Step 5: Solve for x
    x = 26,658.47/143.39
  6. Step 6: Final answer
    x = 185.91

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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.