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Finding the Fourth Proportional to 111,660.50, 154,091.49 and 61,359.50

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Solution

The fourth proportional to 111,660.50, 154,091.49 and 61,359.50 is: 84,676.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,660.50 : 154,091.49 = 61,359.50 : x
  2. Step 2: Convert to fraction form
    111,660.50/154,091.49 = 61,359.50/x
  3. Step 3: Cross multiply
    111,660.50x = 154,091.49 × 61,359.50
  4. Step 4: Simplify right side
    111,660.50x = 9,454,976,780.66
  5. Step 5: Solve for x
    x = 9,454,976,780.66/111,660.50
  6. Step 6: Final answer
    x = 84,676.11

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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.