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Finding the Fourth Proportional to 206,867.20, 310,300.80 and 136,008.40

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Solution

The fourth proportional to 206,867.20, 310,300.80 and 136,008.40 is: 204,012.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,867.20 : 310,300.80 = 136,008.40 : x
  2. Step 2: Convert to fraction form
    206,867.20/310,300.80 = 136,008.40/x
  3. Step 3: Cross multiply
    206,867.20x = 310,300.80 × 136,008.40
  4. Step 4: Simplify right side
    206,867.20x = 42,203,515,326.72
  5. Step 5: Solve for x
    x = 42,203,515,326.72/206,867.20
  6. Step 6: Final answer
    x = 204,012.60

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