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Finding the Fourth Proportional to 111,691.91, 154,110.40 and 66,384.97

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Solution

The fourth proportional to 111,691.91, 154,110.40 and 66,384.97 is: 91,596.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,691.91 : 154,110.40 = 66,384.97 : x
  2. Step 2: Convert to fraction form
    111,691.91/154,110.40 = 66,384.97/x
  3. Step 3: Cross multiply
    111,691.91x = 154,110.40 × 66,384.97
  4. Step 4: Simplify right side
    111,691.91x = 10,230,613,729.45
  5. Step 5: Solve for x
    x = 10,230,613,729.45/111,691.91
  6. Step 6: Final answer
    x = 91,596.73

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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.