Home / 258,795.06-388,231.77-81,285.38

Finding the Fourth Proportional to 258,795.06, 388,231.77 and 81,285.38

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Solution

The fourth proportional to 258,795.06, 388,231.77 and 81,285.38 is: 121,940.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,795.06 : 388,231.77 = 81,285.38 : x
  2. Step 2: Convert to fraction form
    258,795.06/388,231.77 = 81,285.38/x
  3. Step 3: Cross multiply
    258,795.06x = 388,231.77 × 81,285.38
  4. Step 4: Simplify right side
    258,795.06x = 31,557,566,952.52
  5. Step 5: Solve for x
    x = 31,557,566,952.52/258,795.06
  6. Step 6: Final answer
    x = 121,940.38

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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.