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Finding the Fourth Proportional to 115,390.20, 173,085.30 and 75,991.80

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Solution

The fourth proportional to 115,390.20, 173,085.30 and 75,991.80 is: 113,987.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,390.20 : 173,085.30 = 75,991.80 : x
  2. Step 2: Convert to fraction form
    115,390.20/173,085.30 = 75,991.80/x
  3. Step 3: Cross multiply
    115,390.20x = 173,085.30 × 75,991.80
  4. Step 4: Simplify right side
    115,390.20x = 13,153,063,500.54
  5. Step 5: Solve for x
    x = 13,153,063,500.54/115,390.20
  6. Step 6: Final answer
    x = 113,987.70

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