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Finding the Fourth Proportional to 191.57, 264.36 and 108.68

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Solution

The fourth proportional to 191.57, 264.36 and 108.68 is: 149.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.57 : 264.36 = 108.68 : x
  2. Step 2: Convert to fraction form
    191.57/264.36 = 108.68/x
  3. Step 3: Cross multiply
    191.57x = 264.36 × 108.68
  4. Step 4: Simplify right side
    191.57x = 28,730.64
  5. Step 5: Solve for x
    x = 28,730.64/191.57
  6. Step 6: Final answer
    x = 149.97

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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.