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Finding the Fourth Proportional to 111,965.43, 154,502.13 and 66,636.11

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Solution

The fourth proportional to 111,965.43, 154,502.13 and 66,636.11 is: 91,951.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,965.43 : 154,502.13 = 66,636.11 : x
  2. Step 2: Convert to fraction form
    111,965.43/154,502.13 = 66,636.11/x
  3. Step 3: Cross multiply
    111,965.43x = 154,502.13 × 66,636.11
  4. Step 4: Simplify right side
    111,965.43x = 10,295,420,157.40
  5. Step 5: Solve for x
    x = 10,295,420,157.40/111,965.43
  6. Step 6: Final answer
    x = 91,951.78

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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.