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Finding the Fourth Proportional to 111,912.84, 154,439.22 and 61,611.80

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Solution

The fourth proportional to 111,912.84, 154,439.22 and 61,611.80 is: 85,024.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,912.84 : 154,439.22 = 61,611.80 : x
  2. Step 2: Convert to fraction form
    111,912.84/154,439.22 = 61,611.80/x
  3. Step 3: Cross multiply
    111,912.84x = 154,439.22 × 61,611.80
  4. Step 4: Simplify right side
    111,912.84x = 9,515,278,334.80
  5. Step 5: Solve for x
    x = 9,515,278,334.80/111,912.84
  6. Step 6: Final answer
    x = 85,024.01

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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.