Home / 259,015.63-388,575.99-81,481.35

Finding the Fourth Proportional to 259,015.63, 388,575.99 and 81,481.35

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Solution

The fourth proportional to 259,015.63, 388,575.99 and 81,481.35 is: 122,238.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,015.63 : 388,575.99 = 81,481.35 : x
  2. Step 2: Convert to fraction form
    259,015.63/388,575.99 = 81,481.35/x
  3. Step 3: Cross multiply
    259,015.63x = 388,575.99 × 81,481.35
  4. Step 4: Simplify right side
    259,015.63x = 31,661,695,091.18
  5. Step 5: Solve for x
    x = 31,661,695,091.18/259,015.63
  6. Step 6: Final answer
    x = 122,238.55

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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.