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Finding the Fourth Proportional to 153.85, 229.59 and 126.85

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Solution

The fourth proportional to 153.85, 229.59 and 126.85 is: 189.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.85 : 229.59 = 126.85 : x
  2. Step 2: Convert to fraction form
    153.85/229.59 = 126.85/x
  3. Step 3: Cross multiply
    153.85x = 229.59 × 126.85
  4. Step 4: Simplify right side
    153.85x = 29,123.49
  5. Step 5: Solve for x
    x = 29,123.49/153.85
  6. Step 6: Final answer
    x = 189.30

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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.