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Finding the Fourth Proportional to 208,546.80, 312,820.20 and 129,814.80

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Solution

The fourth proportional to 208,546.80, 312,820.20 and 129,814.80 is: 194,722.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,546.80 : 312,820.20 = 129,814.80 : x
  2. Step 2: Convert to fraction form
    208,546.80/312,820.20 = 129,814.80/x
  3. Step 3: Cross multiply
    208,546.80x = 312,820.20 × 129,814.80
  4. Step 4: Simplify right side
    208,546.80x = 40,608,691,698.96
  5. Step 5: Solve for x
    x = 40,608,691,698.96/208,546.80
  6. Step 6: Final answer
    x = 194,722.20

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