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Finding the Fourth Proportional to 125,788.78, 173,591.67 and 68,431.33

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Solution

The fourth proportional to 125,788.78, 173,591.67 and 68,431.33 is: 94,436.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,788.78 : 173,591.67 = 68,431.33 : x
  2. Step 2: Convert to fraction form
    125,788.78/173,591.67 = 68,431.33/x
  3. Step 3: Cross multiply
    125,788.78x = 173,591.67 × 68,431.33
  4. Step 4: Simplify right side
    125,788.78x = 11,879,109,328.63
  5. Step 5: Solve for x
    x = 11,879,109,328.63/125,788.78
  6. Step 6: Final answer
    x = 94,436.95

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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.