Home / 128,198.75-192,320.00-39,450.29

Finding the Fourth Proportional to 128,198.75, 192,320.00 and 39,450.29

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Solution

The fourth proportional to 128,198.75, 192,320.00 and 39,450.29 is: 59,182.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,198.75 : 192,320.00 = 39,450.29 : x
  2. Step 2: Convert to fraction form
    128,198.75/192,320.00 = 39,450.29/x
  3. Step 3: Cross multiply
    128,198.75x = 192,320.00 × 39,450.29
  4. Step 4: Simplify right side
    128,198.75x = 7,587,079,732.73
  5. Step 5: Solve for x
    x = 7,587,079,732.73/128,198.75
  6. Step 6: Final answer
    x = 59,182.17

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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.