Home / 128,120.14-192,198.59-39,381.10

Finding the Fourth Proportional to 128,120.14, 192,198.59 and 39,381.10

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Solution

The fourth proportional to 128,120.14, 192,198.59 and 39,381.10 is: 59,077.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,120.14 : 192,198.59 = 39,381.10 : x
  2. Step 2: Convert to fraction form
    128,120.14/192,198.59 = 39,381.10/x
  3. Step 3: Cross multiply
    128,120.14x = 192,198.59 × 39,381.10
  4. Step 4: Simplify right side
    128,120.14x = 7,568,991,362.93
  5. Step 5: Solve for x
    x = 7,568,991,362.93/128,120.14
  6. Step 6: Final answer
    x = 59,077.29

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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.