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Finding the Fourth Proportional to 209,989.20, 314,901.90 and 91,579.80

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Solution

The fourth proportional to 209,989.20, 314,901.90 and 91,579.80 is: 137,333.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,989.20 : 314,901.90 = 91,579.80 : x
  2. Step 2: Convert to fraction form
    209,989.20/314,901.90 = 91,579.80/x
  3. Step 3: Cross multiply
    209,989.20x = 314,901.90 × 91,579.80
  4. Step 4: Simplify right side
    209,989.20x = 28,838,653,021.62
  5. Step 5: Solve for x
    x = 28,838,653,021.62/209,989.20
  6. Step 6: Final answer
    x = 137,333.98

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