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Finding the Fourth Proportional to 139,114.20, 191,765.32 and 85,299.44

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Solution

The fourth proportional to 139,114.20, 191,765.32 and 85,299.44 is: 117,583.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,114.20 : 191,765.32 = 85,299.44 : x
  2. Step 2: Convert to fraction form
    139,114.20/191,765.32 = 85,299.44/x
  3. Step 3: Cross multiply
    139,114.20x = 191,765.32 × 85,299.44
  4. Step 4: Simplify right side
    139,114.20x = 16,357,474,407.42
  5. Step 5: Solve for x
    x = 16,357,474,407.42/139,114.20
  6. Step 6: Final answer
    x = 117,583.07

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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.