Home / 259,825.12-389,588.87-79,863.73

Finding the Fourth Proportional to 259,825.12, 389,588.87 and 79,863.73

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Solution

The fourth proportional to 259,825.12, 389,588.87 and 79,863.73 is: 119,749.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,825.12 : 389,588.87 = 79,863.73 : x
  2. Step 2: Convert to fraction form
    259,825.12/389,588.87 = 79,863.73/x
  3. Step 3: Cross multiply
    259,825.12x = 389,588.87 × 79,863.73
  4. Step 4: Simplify right side
    259,825.12x = 31,114,018,951.39
  5. Step 5: Solve for x
    x = 31,114,018,951.39/259,825.12
  6. Step 6: Final answer
    x = 119,749.85

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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.