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Finding the Fourth Proportional to 153.37, 231.11 and 126.91

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Solution

The fourth proportional to 153.37, 231.11 and 126.91 is: 191.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.37 : 231.11 = 126.91 : x
  2. Step 2: Convert to fraction form
    153.37/231.11 = 126.91/x
  3. Step 3: Cross multiply
    153.37x = 231.11 × 126.91
  4. Step 4: Simplify right side
    153.37x = 29,330.17
  5. Step 5: Solve for x
    x = 29,330.17/153.37
  6. Step 6: Final answer
    x = 191.24

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.