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Finding the Fourth Proportional to 125,419.55, 173,078.09 and 68,057.42

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Solution

The fourth proportional to 125,419.55, 173,078.09 and 68,057.42 is: 93,918.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,419.55 : 173,078.09 = 68,057.42 : x
  2. Step 2: Convert to fraction form
    125,419.55/173,078.09 = 68,057.42/x
  3. Step 3: Cross multiply
    125,419.55x = 173,078.09 × 68,057.42
  4. Step 4: Simplify right side
    125,419.55x = 11,779,247,568.68
  5. Step 5: Solve for x
    x = 11,779,247,568.68/125,419.55
  6. Step 6: Final answer
    x = 93,918.76

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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.