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Finding the Fourth Proportional to 161.26, 222.10 and 153.42

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Solution

The fourth proportional to 161.26, 222.10 and 153.42 is: 211.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.26 : 222.10 = 153.42 : x
  2. Step 2: Convert to fraction form
    161.26/222.10 = 153.42/x
  3. Step 3: Cross multiply
    161.26x = 222.10 × 153.42
  4. Step 4: Simplify right side
    161.26x = 34,074.58
  5. Step 5: Solve for x
    x = 34,074.58/161.26
  6. Step 6: Final answer
    x = 211.30

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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.