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Finding the Fourth Proportional to 166.92, 250.35 and 45.15

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Solution

The fourth proportional to 166.92, 250.35 and 45.15 is: 67.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.92 : 250.35 = 45.15 : x
  2. Step 2: Convert to fraction form
    166.92/250.35 = 45.15/x
  3. Step 3: Cross multiply
    166.92x = 250.35 × 45.15
  4. Step 4: Simplify right side
    166.92x = 11,303.26
  5. Step 5: Solve for x
    x = 11,303.26/166.92
  6. Step 6: Final answer
    x = 67.72

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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.