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Finding the Fourth Proportional to 136,332.90, 188,137.62 and 78,980.04

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Solution

The fourth proportional to 136,332.90, 188,137.62 and 78,980.04 is: 108,991.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,332.90 : 188,137.62 = 78,980.04 : x
  2. Step 2: Convert to fraction form
    136,332.90/188,137.62 = 78,980.04/x
  3. Step 3: Cross multiply
    136,332.90x = 188,137.62 × 78,980.04
  4. Step 4: Simplify right side
    136,332.90x = 14,859,116,753.10
  5. Step 5: Solve for x
    x = 14,859,116,753.10/136,332.90
  6. Step 6: Final answer
    x = 108,991.42

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