Home / 139,645.14-192,677.50-79,201.86

Finding the Fourth Proportional to 139,645.14, 192,677.50 and 79,201.86

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Solution

The fourth proportional to 139,645.14, 192,677.50 and 79,201.86 is: 109,279.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,645.14 : 192,677.50 = 79,201.86 : x
  2. Step 2: Convert to fraction form
    139,645.14/192,677.50 = 79,201.86/x
  3. Step 3: Cross multiply
    139,645.14x = 192,677.50 × 79,201.86
  4. Step 4: Simplify right side
    139,645.14x = 15,260,416,380.15
  5. Step 5: Solve for x
    x = 15,260,416,380.15/139,645.14
  6. Step 6: Final answer
    x = 109,279.97

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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.