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Finding the Fourth Proportional to 111,961.20, 167,650.20 and 106,712.40

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Solution

The fourth proportional to 111,961.20, 167,650.20 and 106,712.40 is: 159,790.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,961.20 : 167,650.20 = 106,712.40 : x
  2. Step 2: Convert to fraction form
    111,961.20/167,650.20 = 106,712.40/x
  3. Step 3: Cross multiply
    111,961.20x = 167,650.20 × 106,712.40
  4. Step 4: Simplify right side
    111,961.20x = 17,890,355,202.48
  5. Step 5: Solve for x
    x = 17,890,355,202.48/111,961.20
  6. Step 6: Final answer
    x = 159,790.67

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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.