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Finding the Fourth Proportional to 111,700.92, 154,122.81 and 66,393.96

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Solution

The fourth proportional to 111,700.92, 154,122.81 and 66,393.96 is: 91,609.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,700.92 : 154,122.81 = 66,393.96 : x
  2. Step 2: Convert to fraction form
    111,700.92/154,122.81 = 66,393.96/x
  3. Step 3: Cross multiply
    111,700.92x = 154,122.81 × 66,393.96
  4. Step 4: Simplify right side
    111,700.92x = 10,232,823,682.23
  5. Step 5: Solve for x
    x = 10,232,823,682.23/111,700.92
  6. Step 6: Final answer
    x = 91,609.13

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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.