Home / 139,329.28-192,286.40-78,910.60

Finding the Fourth Proportional to 139,329.28, 192,286.40 and 78,910.60

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Solution

The fourth proportional to 139,329.28, 192,286.40 and 78,910.60 is: 108,903.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,329.28 : 192,286.40 = 78,910.60 : x
  2. Step 2: Convert to fraction form
    139,329.28/192,286.40 = 78,910.60/x
  3. Step 3: Cross multiply
    139,329.28x = 192,286.40 × 78,910.60
  4. Step 4: Simplify right side
    139,329.28x = 15,173,435,195.84
  5. Step 5: Solve for x
    x = 15,173,435,195.84/139,329.28
  6. Step 6: Final answer
    x = 108,903.42

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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.