Home / 259,665.62-389,438.28-82,139.54

Finding the Fourth Proportional to 259,665.62, 389,438.28 and 82,139.54

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Solution

The fourth proportional to 259,665.62, 389,438.28 and 82,139.54 is: 123,190.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,665.62 : 389,438.28 = 82,139.54 : x
  2. Step 2: Convert to fraction form
    259,665.62/389,438.28 = 82,139.54/x
  3. Step 3: Cross multiply
    259,665.62x = 389,438.28 × 82,139.54
  4. Step 4: Simplify right side
    259,665.62x = 31,988,279,230.40
  5. Step 5: Solve for x
    x = 31,988,279,230.40/259,665.62
  6. Step 6: Final answer
    x = 123,190.28

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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.