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Finding the Fourth Proportional to 191.69, 264.62 and 136.61

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Solution

The fourth proportional to 191.69, 264.62 and 136.61 is: 188.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.69 : 264.62 = 136.61 : x
  2. Step 2: Convert to fraction form
    191.69/264.62 = 136.61/x
  3. Step 3: Cross multiply
    191.69x = 264.62 × 136.61
  4. Step 4: Simplify right side
    191.69x = 36,147.73
  5. Step 5: Solve for x
    x = 36,147.73/191.69
  6. Step 6: Final answer
    x = 188.58

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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.