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Finding the Fourth Proportional to 191.26, 263.93 and 113.66

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Solution

The fourth proportional to 191.26, 263.93 and 113.66 is: 156.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.26 : 263.93 = 113.66 : x
  2. Step 2: Convert to fraction form
    191.26/263.93 = 113.66/x
  3. Step 3: Cross multiply
    191.26x = 263.93 × 113.66
  4. Step 4: Simplify right side
    191.26x = 29,998.28
  5. Step 5: Solve for x
    x = 29,998.28/191.26
  6. Step 6: Final answer
    x = 156.85

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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.