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Finding the Fourth Proportional to 111,909.42, 167,639.28 and 55,579.14

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Solution

The fourth proportional to 111,909.42, 167,639.28 and 55,579.14 is: 83,257.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,909.42 : 167,639.28 = 55,579.14 : x
  2. Step 2: Convert to fraction form
    111,909.42/167,639.28 = 55,579.14/x
  3. Step 3: Cross multiply
    111,909.42x = 167,639.28 × 55,579.14
  4. Step 4: Simplify right side
    111,909.42x = 9,317,247,012.62
  5. Step 5: Solve for x
    x = 9,317,247,012.62/111,909.42
  6. Step 6: Final answer
    x = 83,257.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.