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Finding the Fourth Proportional to 111,869.65, 154,378.51 and 61,568.65

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Solution

The fourth proportional to 111,869.65, 154,378.51 and 61,568.65 is: 84,963.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,869.65 : 154,378.51 = 61,568.65 : x
  2. Step 2: Convert to fraction form
    111,869.65/154,378.51 = 61,568.65/x
  3. Step 3: Cross multiply
    111,869.65x = 154,378.51 × 61,568.65
  4. Step 4: Simplify right side
    111,869.65x = 9,504,876,449.71
  5. Step 5: Solve for x
    x = 9,504,876,449.71/111,869.65
  6. Step 6: Final answer
    x = 84,963.85

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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.