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Finding the Fourth Proportional to 161.04, 222.10 and 129.76

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Solution

The fourth proportional to 161.04, 222.10 and 129.76 is: 178.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.04 : 222.10 = 129.76 : x
  2. Step 2: Convert to fraction form
    161.04/222.10 = 129.76/x
  3. Step 3: Cross multiply
    161.04x = 222.10 × 129.76
  4. Step 4: Simplify right side
    161.04x = 28,819.70
  5. Step 5: Solve for x
    x = 28,819.70/161.04
  6. Step 6: Final answer
    x = 178.96

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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.