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Finding the Fourth Proportional to 166.89, 231.51 and 154.74

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Solution

The fourth proportional to 166.89, 231.51 and 154.74 is: 214.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.89 : 231.51 = 154.74 : x
  2. Step 2: Convert to fraction form
    166.89/231.51 = 154.74/x
  3. Step 3: Cross multiply
    166.89x = 231.51 × 154.74
  4. Step 4: Simplify right side
    166.89x = 35,823.86
  5. Step 5: Solve for x
    x = 35,823.86/166.89
  6. Step 6: Final answer
    x = 214.66

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.