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Finding the Fourth Proportional to 191.13, 263.76 and 113.50

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Solution

The fourth proportional to 191.13, 263.76 and 113.50 is: 156.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.13 : 263.76 = 113.50 : x
  2. Step 2: Convert to fraction form
    191.13/263.76 = 113.50/x
  3. Step 3: Cross multiply
    191.13x = 263.76 × 113.50
  4. Step 4: Simplify right side
    191.13x = 29,936.76
  5. Step 5: Solve for x
    x = 29,936.76/191.13
  6. Step 6: Final answer
    x = 156.63

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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.