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Finding the Fourth Proportional to 81,728.19, 112,781.77 and 45,919.71

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Solution

The fourth proportional to 81,728.19, 112,781.77 and 45,919.71 is: 63,367.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,728.19 : 112,781.77 = 45,919.71 : x
  2. Step 2: Convert to fraction form
    81,728.19/112,781.77 = 45,919.71/x
  3. Step 3: Cross multiply
    81,728.19x = 112,781.77 × 45,919.71
  4. Step 4: Simplify right side
    81,728.19x = 5,178,906,056.89
  5. Step 5: Solve for x
    x = 5,178,906,056.89/81,728.19
  6. Step 6: Final answer
    x = 63,367.44

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