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Finding the Fourth Proportional to 139,311.02, 192,253.02 and 81,954.38

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Solution

The fourth proportional to 139,311.02, 192,253.02 and 81,954.38 is: 113,099.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,311.02 : 192,253.02 = 81,954.38 : x
  2. Step 2: Convert to fraction form
    139,311.02/192,253.02 = 81,954.38/x
  3. Step 3: Cross multiply
    139,311.02x = 192,253.02 × 81,954.38
  4. Step 4: Simplify right side
    139,311.02x = 15,755,977,057.23
  5. Step 5: Solve for x
    x = 15,755,977,057.23/139,311.02
  6. Step 6: Final answer
    x = 113,099.29

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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.