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Finding the Fourth Proportional to 261,163.62, 391,496.94 and 83,556.12

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Solution

The fourth proportional to 261,163.62, 391,496.94 and 83,556.12 is: 125,254.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,163.62 : 391,496.94 = 83,556.12 : x
  2. Step 2: Convert to fraction form
    261,163.62/391,496.94 = 83,556.12/x
  3. Step 3: Cross multiply
    261,163.62x = 391,496.94 × 83,556.12
  4. Step 4: Simplify right side
    261,163.62x = 32,711,965,298.27
  5. Step 5: Solve for x
    x = 32,711,965,298.27/261,163.62
  6. Step 6: Final answer
    x = 125,254.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.