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Finding the Fourth Proportional to 161.87, 223.22 and 126.84

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Solution

The fourth proportional to 161.87, 223.22 and 126.84 is: 174.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.87 : 223.22 = 126.84 : x
  2. Step 2: Convert to fraction form
    161.87/223.22 = 126.84/x
  3. Step 3: Cross multiply
    161.87x = 223.22 × 126.84
  4. Step 4: Simplify right side
    161.87x = 28,312.59
  5. Step 5: Solve for x
    x = 28,312.59/161.87
  6. Step 6: Final answer
    x = 174.91

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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.