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Finding the Fourth Proportional to 191.87, 264.84 and 136.64

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Solution

The fourth proportional to 191.87, 264.84 and 136.64 is: 188.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.87 : 264.84 = 136.64 : x
  2. Step 2: Convert to fraction form
    191.87/264.84 = 136.64/x
  3. Step 3: Cross multiply
    191.87x = 264.84 × 136.64
  4. Step 4: Simplify right side
    191.87x = 36,187.55
  5. Step 5: Solve for x
    x = 36,187.55/191.87
  6. Step 6: Final answer
    x = 188.61

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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.