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Finding the Fourth Proportional to 191,474.20, 287,212.02 and 66,815.20

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Solution

The fourth proportional to 191,474.20, 287,212.02 and 66,815.20 is: 100,223.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,474.20 : 287,212.02 = 66,815.20 : x
  2. Step 2: Convert to fraction form
    191,474.20/287,212.02 = 66,815.20/x
  3. Step 3: Cross multiply
    191,474.20x = 287,212.02 × 66,815.20
  4. Step 4: Simplify right side
    191,474.20x = 19,190,128,558.70
  5. Step 5: Solve for x
    x = 19,190,128,558.70/191,474.20
  6. Step 6: Final answer
    x = 100,223.05

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