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Finding the Fourth Proportional to 139,443.92, 192,434.11 and 75,781.73

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Solution

The fourth proportional to 139,443.92, 192,434.11 and 75,781.73 is: 104,579.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,443.92 : 192,434.11 = 75,781.73 : x
  2. Step 2: Convert to fraction form
    139,443.92/192,434.11 = 75,781.73/x
  3. Step 3: Cross multiply
    139,443.92x = 192,434.11 × 75,781.73
  4. Step 4: Simplify right side
    139,443.92x = 14,582,989,766.81
  5. Step 5: Solve for x
    x = 14,582,989,766.81/139,443.92
  6. Step 6: Final answer
    x = 104,579.60

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1.5x scale

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.