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Finding the Fourth Proportional to 191.55, 263.94 and 136.35

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Solution

The fourth proportional to 191.55, 263.94 and 136.35 is: 187.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.55 : 263.94 = 136.35 : x
  2. Step 2: Convert to fraction form
    191.55/263.94 = 136.35/x
  3. Step 3: Cross multiply
    191.55x = 263.94 × 136.35
  4. Step 4: Simplify right side
    191.55x = 35,988.22
  5. Step 5: Solve for x
    x = 35,988.22/191.55
  6. Step 6: Final answer
    x = 187.88

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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.