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Finding the Fourth Proportional to 166.80, 229.86 and 155.06

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Solution

The fourth proportional to 166.80, 229.86 and 155.06 is: 213.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.80 : 229.86 = 155.06 : x
  2. Step 2: Convert to fraction form
    166.80/229.86 = 155.06/x
  3. Step 3: Cross multiply
    166.80x = 229.86 × 155.06
  4. Step 4: Simplify right side
    166.80x = 35,640.94
  5. Step 5: Solve for x
    x = 35,640.94/166.80
  6. Step 6: Final answer
    x = 213.67

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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.