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Finding the Fourth Proportional to 191.91, 264.67 and 126.43

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Solution

The fourth proportional to 191.91, 264.67 and 126.43 is: 174.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.91 : 264.67 = 126.43 : x
  2. Step 2: Convert to fraction form
    191.91/264.67 = 126.43/x
  3. Step 3: Cross multiply
    191.91x = 264.67 × 126.43
  4. Step 4: Simplify right side
    191.91x = 33,462.23
  5. Step 5: Solve for x
    x = 33,462.23/191.91
  6. Step 6: Final answer
    x = 174.36

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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.