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Finding the Fourth Proportional to 139,626.99, 192,688.58 and 79,201.71

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Solution

The fourth proportional to 139,626.99, 192,688.58 and 79,201.71 is: 109,300.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,626.99 : 192,688.58 = 79,201.71 : x
  2. Step 2: Convert to fraction form
    139,626.99/192,688.58 = 79,201.71/x
  3. Step 3: Cross multiply
    139,626.99x = 192,688.58 × 79,201.71
  4. Step 4: Simplify right side
    139,626.99x = 15,261,265,033.47
  5. Step 5: Solve for x
    x = 15,261,265,033.47/139,626.99
  6. Step 6: Final answer
    x = 109,300.25

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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.