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Finding the Fourth Proportional to 139,928.19, 193,100.97 and 79,498.94

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Solution

The fourth proportional to 139,928.19, 193,100.97 and 79,498.94 is: 109,708.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,928.19 : 193,100.97 = 79,498.94 : x
  2. Step 2: Convert to fraction form
    139,928.19/193,100.97 = 79,498.94/x
  3. Step 3: Cross multiply
    139,928.19x = 193,100.97 × 79,498.94
  4. Step 4: Simplify right side
    139,928.19x = 15,351,321,462.47
  5. Step 5: Solve for x
    x = 15,351,321,462.47/139,928.19
  6. Step 6: Final answer
    x = 109,708.57

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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.