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Finding the Fourth Proportional to 139,600.16, 192,639.12 and 83,015.84

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Solution

The fourth proportional to 139,600.16, 192,639.12 and 83,015.84 is: 114,556.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,600.16 : 192,639.12 = 83,015.84 : x
  2. Step 2: Convert to fraction form
    139,600.16/192,639.12 = 83,015.84/x
  3. Step 3: Cross multiply
    139,600.16x = 192,639.12 × 83,015.84
  4. Step 4: Simplify right side
    139,600.16x = 15,992,098,363.66
  5. Step 5: Solve for x
    x = 15,992,098,363.66/139,600.16
  6. Step 6: Final answer
    x = 114,556.45

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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.