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Finding the Fourth Proportional to 191.39, 264.15 and 112.71

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Solution

The fourth proportional to 191.39, 264.15 and 112.71 is: 155.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.39 : 264.15 = 112.71 : x
  2. Step 2: Convert to fraction form
    191.39/264.15 = 112.71/x
  3. Step 3: Cross multiply
    191.39x = 264.15 × 112.71
  4. Step 4: Simplify right side
    191.39x = 29,772.35
  5. Step 5: Solve for x
    x = 29,772.35/191.39
  6. Step 6: Final answer
    x = 155.56

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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.