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Finding the Fourth Proportional to 191.57, 264.23 and 129.36

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Solution

The fourth proportional to 191.57, 264.23 and 129.36 is: 178.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.57 : 264.23 = 129.36 : x
  2. Step 2: Convert to fraction form
    191.57/264.23 = 129.36/x
  3. Step 3: Cross multiply
    191.57x = 264.23 × 129.36
  4. Step 4: Simplify right side
    191.57x = 34,181.62
  5. Step 5: Solve for x
    x = 34,181.62/191.57
  6. Step 6: Final answer
    x = 178.43

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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.