Home / 268,907.25-403,360.91-81,918.75

Finding the Fourth Proportional to 268,907.25, 403,360.91 and 81,918.75

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Solution

The fourth proportional to 268,907.25, 403,360.91 and 81,918.75 is: 122,878.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,907.25 : 403,360.91 = 81,918.75 : x
  2. Step 2: Convert to fraction form
    268,907.25/403,360.91 = 81,918.75/x
  3. Step 3: Cross multiply
    268,907.25x = 403,360.91 × 81,918.75
  4. Step 4: Simplify right side
    268,907.25x = 33,042,821,136.47
  5. Step 5: Solve for x
    x = 33,042,821,136.47/268,907.25
  6. Step 6: Final answer
    x = 122,878.13

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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.