Home / 259,640.97-389,475.65-82,134.78

Finding the Fourth Proportional to 259,640.97, 389,475.65 and 82,134.78

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Solution

The fourth proportional to 259,640.97, 389,475.65 and 82,134.78 is: 123,206.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,640.97 : 389,475.65 = 82,134.78 : x
  2. Step 2: Convert to fraction form
    259,640.97/389,475.65 = 82,134.78/x
  3. Step 3: Cross multiply
    259,640.97x = 389,475.65 × 82,134.78
  4. Step 4: Simplify right side
    259,640.97x = 31,989,496,417.43
  5. Step 5: Solve for x
    x = 31,989,496,417.43/259,640.97
  6. Step 6: Final answer
    x = 123,206.66

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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.