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Finding the Fourth Proportional to 234.45, 323.55 and 136.20

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Solution

The fourth proportional to 234.45, 323.55 and 136.20 is: 187.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.45 : 323.55 = 136.20 : x
  2. Step 2: Convert to fraction form
    234.45/323.55 = 136.20/x
  3. Step 3: Cross multiply
    234.45x = 323.55 × 136.20
  4. Step 4: Simplify right side
    234.45x = 44,067.51
  5. Step 5: Solve for x
    x = 44,067.51/234.45
  6. Step 6: Final answer
    x = 187.96

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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.