Home / 258,834.88-388,054.68-81,239.14

Finding the Fourth Proportional to 258,834.88, 388,054.68 and 81,239.14

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Solution

The fourth proportional to 258,834.88, 388,054.68 and 81,239.14 is: 121,796.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,834.88 : 388,054.68 = 81,239.14 : x
  2. Step 2: Convert to fraction form
    258,834.88/388,054.68 = 81,239.14/x
  3. Step 3: Cross multiply
    258,834.88x = 388,054.68 × 81,239.14
  4. Step 4: Simplify right side
    258,834.88x = 31,525,228,476.18
  5. Step 5: Solve for x
    x = 31,525,228,476.18/258,834.88
  6. Step 6: Final answer
    x = 121,796.68

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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.