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Finding the Fourth Proportional to 166.68, 250.05 and 51.11

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Solution

The fourth proportional to 166.68, 250.05 and 51.11 is: 76.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.68 : 250.05 = 51.11 : x
  2. Step 2: Convert to fraction form
    166.68/250.05 = 51.11/x
  3. Step 3: Cross multiply
    166.68x = 250.05 × 51.11
  4. Step 4: Simplify right side
    166.68x = 12,780.68
  5. Step 5: Solve for x
    x = 12,780.68/166.68
  6. Step 6: Final answer
    x = 76.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.