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Finding the Fourth Proportional to 139,928.75, 193,101.75 and 79,499.51

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Solution

The fourth proportional to 139,928.75, 193,101.75 and 79,499.51 is: 109,709.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,928.75 : 193,101.75 = 79,499.51 : x
  2. Step 2: Convert to fraction form
    139,928.75/193,101.75 = 79,499.51/x
  3. Step 3: Cross multiply
    139,928.75x = 193,101.75 × 79,499.51
  4. Step 4: Simplify right side
    139,928.75x = 15,351,493,539.63
  5. Step 5: Solve for x
    x = 15,351,493,539.63/139,928.75
  6. Step 6: Final answer
    x = 109,709.36

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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.