Home / 128,213.70-192,320.55-115,383.30

Finding the Fourth Proportional to 128,213.70, 192,320.55 and 115,383.30

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Solution

The fourth proportional to 128,213.70, 192,320.55 and 115,383.30 is: 173,074.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,213.70 : 192,320.55 = 115,383.30 : x
  2. Step 2: Convert to fraction form
    128,213.70/192,320.55 = 115,383.30/x
  3. Step 3: Cross multiply
    128,213.70x = 192,320.55 × 115,383.30
  4. Step 4: Simplify right side
    128,213.70x = 22,190,579,716.82
  5. Step 5: Solve for x
    x = 22,190,579,716.82/128,213.70
  6. Step 6: Final answer
    x = 173,074.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.