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Finding the Fourth Proportional to 139,593.78, 192,639.87 and 75,931.56

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Solution

The fourth proportional to 139,593.78, 192,639.87 and 75,931.56 is: 104,785.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,593.78 : 192,639.87 = 75,931.56 : x
  2. Step 2: Convert to fraction form
    139,593.78/192,639.87 = 75,931.56/x
  3. Step 3: Cross multiply
    139,593.78x = 192,639.87 × 75,931.56
  4. Step 4: Simplify right side
    139,593.78x = 14,627,445,847.30
  5. Step 5: Solve for x
    x = 14,627,445,847.30/139,593.78
  6. Step 6: Final answer
    x = 104,785.80

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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.