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Finding the Fourth Proportional to 111,663.66, 154,033.49 and 68,613.25

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Solution

The fourth proportional to 111,663.66, 154,033.49 and 68,613.25 is: 94,647.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,663.66 : 154,033.49 = 68,613.25 : x
  2. Step 2: Convert to fraction form
    111,663.66/154,033.49 = 68,613.25/x
  3. Step 3: Cross multiply
    111,663.66x = 154,033.49 × 68,613.25
  4. Step 4: Simplify right side
    111,663.66x = 10,568,738,383.79
  5. Step 5: Solve for x
    x = 10,568,738,383.79/111,663.66
  6. Step 6: Final answer
    x = 94,647.96

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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.