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Finding the Fourth Proportional to 139,604.54, 192,654.11 and 75,942.18

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Solution

The fourth proportional to 139,604.54, 192,654.11 and 75,942.18 is: 104,800.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,604.54 : 192,654.11 = 75,942.18 : x
  2. Step 2: Convert to fraction form
    139,604.54/192,654.11 = 75,942.18/x
  3. Step 3: Cross multiply
    139,604.54x = 192,654.11 × 75,942.18
  4. Step 4: Simplify right side
    139,604.54x = 14,630,573,289.22
  5. Step 5: Solve for x
    x = 14,630,573,289.22/139,604.54
  6. Step 6: Final answer
    x = 104,800.13

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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.