Home / 78,728.09-108,682.91-50,069.73

Finding the Fourth Proportional to 78,728.09, 108,682.91 and 50,069.73

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Solution

The fourth proportional to 78,728.09, 108,682.91 and 50,069.73 is: 69,120.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,728.09 : 108,682.91 = 50,069.73 : x
  2. Step 2: Convert to fraction form
    78,728.09/108,682.91 = 50,069.73/x
  3. Step 3: Cross multiply
    78,728.09x = 108,682.91 × 50,069.73
  4. Step 4: Simplify right side
    78,728.09x = 5,441,723,708.97
  5. Step 5: Solve for x
    x = 5,441,723,708.97/78,728.09
  6. Step 6: Final answer
    x = 69,120.49

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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.