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Finding the Fourth Proportional to 111,791.21, 154,220.98 and 66,443.42

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Solution

The fourth proportional to 111,791.21, 154,220.98 and 66,443.42 is: 91,661.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,791.21 : 154,220.98 = 66,443.42 : x
  2. Step 2: Convert to fraction form
    111,791.21/154,220.98 = 66,443.42/x
  3. Step 3: Cross multiply
    111,791.21x = 154,220.98 × 66,443.42
  4. Step 4: Simplify right side
    111,791.21x = 10,246,969,346.95
  5. Step 5: Solve for x
    x = 10,246,969,346.95/111,791.21
  6. Step 6: Final answer
    x = 91,661.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.