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Finding the Fourth Proportional to 166.05, 229.05 and 129.15

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Solution

The fourth proportional to 166.05, 229.05 and 129.15 is: 178.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.05 : 229.05 = 129.15 : x
  2. Step 2: Convert to fraction form
    166.05/229.05 = 129.15/x
  3. Step 3: Cross multiply
    166.05x = 229.05 × 129.15
  4. Step 4: Simplify right side
    166.05x = 29,581.81
  5. Step 5: Solve for x
    x = 29,581.81/166.05
  6. Step 6: Final answer
    x = 178.15

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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.