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Finding the Fourth Proportional to 111,919.41, 154,448.51 and 61,618.41

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Solution

The fourth proportional to 111,919.41, 154,448.51 and 61,618.41 is: 85,033.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,919.41 : 154,448.51 = 61,618.41 : x
  2. Step 2: Convert to fraction form
    111,919.41/154,448.51 = 61,618.41/x
  3. Step 3: Cross multiply
    111,919.41x = 154,448.51 × 61,618.41
  4. Step 4: Simplify right side
    111,919.41x = 9,516,871,304.98
  5. Step 5: Solve for x
    x = 9,516,871,304.98/111,919.41
  6. Step 6: Final answer
    x = 85,033.25

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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.