Home / 128,070.56-192,087.78-80,540.76

Finding the Fourth Proportional to 128,070.56, 192,087.78 and 80,540.76

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Solution

The fourth proportional to 128,070.56, 192,087.78 and 80,540.76 is: 120,799.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,070.56 : 192,087.78 = 80,540.76 : x
  2. Step 2: Convert to fraction form
    128,070.56/192,087.78 = 80,540.76/x
  3. Step 3: Cross multiply
    128,070.56x = 192,087.78 × 80,540.76
  4. Step 4: Simplify right side
    128,070.56x = 15,470,895,787.91
  5. Step 5: Solve for x
    x = 15,470,895,787.91/128,070.56
  6. Step 6: Final answer
    x = 120,799.79

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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.