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Finding the Fourth Proportional to 235.08, 324.30 and 136.78

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Solution

The fourth proportional to 235.08, 324.30 and 136.78 is: 188.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.08 : 324.30 = 136.78 : x
  2. Step 2: Convert to fraction form
    235.08/324.30 = 136.78/x
  3. Step 3: Cross multiply
    235.08x = 324.30 × 136.78
  4. Step 4: Simplify right side
    235.08x = 44,356.94
  5. Step 5: Solve for x
    x = 44,356.94/235.08
  6. Step 6: Final answer
    x = 188.69

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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.