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Finding the Fourth Proportional to 268,906.08, 403,419.60 and 81,936.48

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Solution

The fourth proportional to 268,906.08, 403,419.60 and 81,936.48 is: 122,923.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,906.08 : 403,419.60 = 81,936.48 : x
  2. Step 2: Convert to fraction form
    268,906.08/403,419.60 = 81,936.48/x
  3. Step 3: Cross multiply
    268,906.08x = 403,419.60 × 81,936.48
  4. Step 4: Simplify right side
    268,906.08x = 33,054,781,987.01
  5. Step 5: Solve for x
    x = 33,054,781,987.01/268,906.08
  6. Step 6: Final answer
    x = 122,923.15

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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.