Home / 259,921.76-389,896.40-82,415.12

Finding the Fourth Proportional to 259,921.76, 389,896.40 and 82,415.12

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Solution

The fourth proportional to 259,921.76, 389,896.40 and 82,415.12 is: 123,627.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,921.76 : 389,896.40 = 82,415.12 : x
  2. Step 2: Convert to fraction form
    259,921.76/389,896.40 = 82,415.12/x
  3. Step 3: Cross multiply
    259,921.76x = 389,896.40 × 82,415.12
  4. Step 4: Simplify right side
    259,921.76x = 32,133,358,593.57
  5. Step 5: Solve for x
    x = 32,133,358,593.57/259,921.76
  6. Step 6: Final answer
    x = 123,627.04

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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.