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Finding the Fourth Proportional to 81,792.19, 112,959.27 and 72,876.57

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Solution

The fourth proportional to 81,792.19, 112,959.27 and 72,876.57 is: 100,646.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,792.19 : 112,959.27 = 72,876.57 : x
  2. Step 2: Convert to fraction form
    81,792.19/112,959.27 = 72,876.57/x
  3. Step 3: Cross multiply
    81,792.19x = 112,959.27 × 72,876.57
  4. Step 4: Simplify right side
    81,792.19x = 8,232,084,147.30
  5. Step 5: Solve for x
    x = 8,232,084,147.30/81,792.19
  6. Step 6: Final answer
    x = 100,646.33

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