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Finding the Fourth Proportional to 156.91, 234.49 and 126.33

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Solution

The fourth proportional to 156.91, 234.49 and 126.33 is: 188.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.91 : 234.49 = 126.33 : x
  2. Step 2: Convert to fraction form
    156.91/234.49 = 126.33/x
  3. Step 3: Cross multiply
    156.91x = 234.49 × 126.33
  4. Step 4: Simplify right side
    156.91x = 29,623.12
  5. Step 5: Solve for x
    x = 29,623.12/156.91
  6. Step 6: Final answer
    x = 188.79

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.