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Finding the Fourth Proportional to 92,405.34, 137,939.56 and 81,195.30

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Solution

The fourth proportional to 92,405.34, 137,939.56 and 81,195.30 is: 121,205.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,405.34 : 137,939.56 = 81,195.30 : x
  2. Step 2: Convert to fraction form
    92,405.34/137,939.56 = 81,195.30/x
  3. Step 3: Cross multiply
    92,405.34x = 137,939.56 × 81,195.30
  4. Step 4: Simplify right side
    92,405.34x = 11,200,043,753.08
  5. Step 5: Solve for x
    x = 11,200,043,753.08/92,405.34
  6. Step 6: Final answer
    x = 121,205.59

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