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Finding the Fourth Proportional to 256,215.25, 384,556.05 and 136,372.78

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Solution

The fourth proportional to 256,215.25, 384,556.05 and 136,372.78 is: 204,683.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,215.25 : 384,556.05 = 136,372.78 : x
  2. Step 2: Convert to fraction form
    256,215.25/384,556.05 = 136,372.78/x
  3. Step 3: Cross multiply
    256,215.25x = 384,556.05 × 136,372.78
  4. Step 4: Simplify right side
    256,215.25x = 52,442,976,890.29
  5. Step 5: Solve for x
    x = 52,442,976,890.29/256,215.25
  6. Step 6: Final answer
    x = 204,683.27

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