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Finding the Fourth Proportional to 166.05, 228.56 and 122.31

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Solution

The fourth proportional to 166.05, 228.56 and 122.31 is: 168.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.05 : 228.56 = 122.31 : x
  2. Step 2: Convert to fraction form
    166.05/228.56 = 122.31/x
  3. Step 3: Cross multiply
    166.05x = 228.56 × 122.31
  4. Step 4: Simplify right side
    166.05x = 27,954.56
  5. Step 5: Solve for x
    x = 27,954.56/166.05
  6. Step 6: Final answer
    x = 168.35

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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.