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Finding the Fourth Proportional to 139,197.06, 192,089.25 and 78,766.59

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Solution

The fourth proportional to 139,197.06, 192,089.25 and 78,766.59 is: 108,696.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,197.06 : 192,089.25 = 78,766.59 : x
  2. Step 2: Convert to fraction form
    139,197.06/192,089.25 = 78,766.59/x
  3. Step 3: Cross multiply
    139,197.06x = 192,089.25 × 78,766.59
  4. Step 4: Simplify right side
    139,197.06x = 15,130,215,198.16
  5. Step 5: Solve for x
    x = 15,130,215,198.16/139,197.06
  6. Step 6: Final answer
    x = 108,696.37

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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.