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Finding the Fourth Proportional to 166.12, 228.95 and 122.38

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Solution

The fourth proportional to 166.12, 228.95 and 122.38 is: 168.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.12 : 228.95 = 122.38 : x
  2. Step 2: Convert to fraction form
    166.12/228.95 = 122.38/x
  3. Step 3: Cross multiply
    166.12x = 228.95 × 122.38
  4. Step 4: Simplify right side
    166.12x = 28,018.90
  5. Step 5: Solve for x
    x = 28,018.90/166.12
  6. Step 6: Final answer
    x = 168.67

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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.