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Finding the Fourth Proportional to 166.68, 228.96 and 138.96

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Solution

The fourth proportional to 166.68, 228.96 and 138.96 is: 190.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.68 : 228.96 = 138.96 : x
  2. Step 2: Convert to fraction form
    166.68/228.96 = 138.96/x
  3. Step 3: Cross multiply
    166.68x = 228.96 × 138.96
  4. Step 4: Simplify right side
    166.68x = 31,816.28
  5. Step 5: Solve for x
    x = 31,816.28/166.68
  6. Step 6: Final answer
    x = 190.88

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.