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Finding the Fourth Proportional to 153.26, 229.42 and 104.31

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Solution

The fourth proportional to 153.26, 229.42 and 104.31 is: 156.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.26 : 229.42 = 104.31 : x
  2. Step 2: Convert to fraction form
    153.26/229.42 = 104.31/x
  3. Step 3: Cross multiply
    153.26x = 229.42 × 104.31
  4. Step 4: Simplify right side
    153.26x = 23,930.87
  5. Step 5: Solve for x
    x = 23,930.87/153.26
  6. Step 6: Final answer
    x = 156.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.