Home / 139,334.45-192,293.41-78,915.85

Finding the Fourth Proportional to 139,334.45, 192,293.41 and 78,915.85

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Solution

The fourth proportional to 139,334.45, 192,293.41 and 78,915.85 is: 108,910.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,334.45 : 192,293.41 = 78,915.85 : x
  2. Step 2: Convert to fraction form
    139,334.45/192,293.41 = 78,915.85/x
  3. Step 3: Cross multiply
    139,334.45x = 192,293.41 × 78,915.85
  4. Step 4: Simplify right side
    139,334.45x = 15,174,996,713.01
  5. Step 5: Solve for x
    x = 15,174,996,713.01/139,334.45
  6. Step 6: Final answer
    x = 108,910.58

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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.