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Finding the Fourth Proportional to 139,511.54, 192,556.50 and 91,769.60

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Solution

The fourth proportional to 139,511.54, 192,556.50 and 91,769.60 is: 126,662.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,511.54 : 192,556.50 = 91,769.60 : x
  2. Step 2: Convert to fraction form
    139,511.54/192,556.50 = 91,769.60/x
  3. Step 3: Cross multiply
    139,511.54x = 192,556.50 × 91,769.60
  4. Step 4: Simplify right side
    139,511.54x = 17,670,832,982.40
  5. Step 5: Solve for x
    x = 17,670,832,982.40/139,511.54
  6. Step 6: Final answer
    x = 126,662.16

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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.