Home / 139,408.24-192,395.92-78,993.58

Finding the Fourth Proportional to 139,408.24, 192,395.92 and 78,993.58

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Solution

The fourth proportional to 139,408.24, 192,395.92 and 78,993.58 is: 109,018.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,408.24 : 192,395.92 = 78,993.58 : x
  2. Step 2: Convert to fraction form
    139,408.24/192,395.92 = 78,993.58/x
  3. Step 3: Cross multiply
    139,408.24x = 192,395.92 × 78,993.58
  4. Step 4: Simplify right side
    139,408.24x = 15,198,042,498.19
  5. Step 5: Solve for x
    x = 15,198,042,498.19/139,408.24
  6. Step 6: Final answer
    x = 109,018.25

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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.