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Finding the Fourth Proportional to 139,847.67, 192,991.11 and 79,419.57

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Solution

The fourth proportional to 139,847.67, 192,991.11 and 79,419.57 is: 109,599.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,847.67 : 192,991.11 = 79,419.57 : x
  2. Step 2: Convert to fraction form
    139,847.67/192,991.11 = 79,419.57/x
  3. Step 3: Cross multiply
    139,847.67x = 192,991.11 × 79,419.57
  4. Step 4: Simplify right side
    139,847.67x = 15,327,270,970.02
  5. Step 5: Solve for x
    x = 15,327,270,970.02/139,847.67
  6. Step 6: Final answer
    x = 109,599.76

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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.