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Finding the Fourth Proportional to 78,091.47, 117,137.21 and 18,927.14

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Solution

The fourth proportional to 78,091.47, 117,137.21 and 18,927.14 is: 28,390.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,091.47 : 117,137.21 = 18,927.14 : x
  2. Step 2: Convert to fraction form
    78,091.47/117,137.21 = 18,927.14/x
  3. Step 3: Cross multiply
    78,091.47x = 117,137.21 × 18,927.14
  4. Step 4: Simplify right side
    78,091.47x = 2,217,072,186.73
  5. Step 5: Solve for x
    x = 2,217,072,186.73/78,091.47
  6. Step 6: Final answer
    x = 28,390.71

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