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Finding the Fourth Proportional to 111,217.40, 166,826.10 and 66,821.30

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Solution

The fourth proportional to 111,217.40, 166,826.10 and 66,821.30 is: 100,231.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,217.40 : 166,826.10 = 66,821.30 : x
  2. Step 2: Convert to fraction form
    111,217.40/166,826.10 = 66,821.30/x
  3. Step 3: Cross multiply
    111,217.40x = 166,826.10 × 66,821.30
  4. Step 4: Simplify right side
    111,217.40x = 11,147,536,875.93
  5. Step 5: Solve for x
    x = 11,147,536,875.93/111,217.40
  6. Step 6: Final answer
    x = 100,231.95

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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.