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Finding the Fourth Proportional to 68,106.09, 102,159.87 and 20,728.86

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Solution

The fourth proportional to 68,106.09, 102,159.87 and 20,728.86 is: 31,093.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,106.09 : 102,159.87 = 20,728.86 : x
  2. Step 2: Convert to fraction form
    68,106.09/102,159.87 = 20,728.86/x
  3. Step 3: Cross multiply
    68,106.09x = 102,159.87 × 20,728.86
  4. Step 4: Simplify right side
    68,106.09x = 2,117,657,642.85
  5. Step 5: Solve for x
    x = 2,117,657,642.85/68,106.09
  6. Step 6: Final answer
    x = 31,093.51

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