Home / 259,579.72-389,367.12-82,086.76

Finding the Fourth Proportional to 259,579.72, 389,367.12 and 82,086.76

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Solution

The fourth proportional to 259,579.72, 389,367.12 and 82,086.76 is: 123,129.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,579.72 : 389,367.12 = 82,086.76 : x
  2. Step 2: Convert to fraction form
    259,579.72/389,367.12 = 82,086.76/x
  3. Step 3: Cross multiply
    259,579.72x = 389,367.12 × 82,086.76
  4. Step 4: Simplify right side
    259,579.72x = 31,961,885,331.33
  5. Step 5: Solve for x
    x = 31,961,885,331.33/259,579.72
  6. Step 6: Final answer
    x = 123,129.36

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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.