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Finding the Fourth Proportional to 166.43, 229.65 and 100.94

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Solution

The fourth proportional to 166.43, 229.65 and 100.94 is: 139.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.43 : 229.65 = 100.94 : x
  2. Step 2: Convert to fraction form
    166.43/229.65 = 100.94/x
  3. Step 3: Cross multiply
    166.43x = 229.65 × 100.94
  4. Step 4: Simplify right side
    166.43x = 23,180.87
  5. Step 5: Solve for x
    x = 23,180.87/166.43
  6. Step 6: Final answer
    x = 139.29

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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.