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Finding the Fourth Proportional to 161.96, 223.59 and 122.57

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Solution

The fourth proportional to 161.96, 223.59 and 122.57 is: 169.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.96 : 223.59 = 122.57 : x
  2. Step 2: Convert to fraction form
    161.96/223.59 = 122.57/x
  3. Step 3: Cross multiply
    161.96x = 223.59 × 122.57
  4. Step 4: Simplify right side
    161.96x = 27,405.43
  5. Step 5: Solve for x
    x = 27,405.43/161.96
  6. Step 6: Final answer
    x = 169.21

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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.