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Finding the Fourth Proportional to 111,965.61, 154,502.39 and 66,636.29

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Solution

The fourth proportional to 111,965.61, 154,502.39 and 66,636.29 is: 91,952.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,965.61 : 154,502.39 = 66,636.29 : x
  2. Step 2: Convert to fraction form
    111,965.61/154,502.39 = 66,636.29/x
  3. Step 3: Cross multiply
    111,965.61x = 154,502.39 × 66,636.29
  4. Step 4: Simplify right side
    111,965.61x = 10,295,464,960.04
  5. Step 5: Solve for x
    x = 10,295,464,960.04/111,965.61
  6. Step 6: Final answer
    x = 91,952.03

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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.