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Finding the Fourth Proportional to 206,066.40, 309,099.60 and 100,831.20

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Solution

The fourth proportional to 206,066.40, 309,099.60 and 100,831.20 is: 151,246.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,066.40 : 309,099.60 = 100,831.20 : x
  2. Step 2: Convert to fraction form
    206,066.40/309,099.60 = 100,831.20/x
  3. Step 3: Cross multiply
    206,066.40x = 309,099.60 × 100,831.20
  4. Step 4: Simplify right side
    206,066.40x = 31,166,883,587.52
  5. Step 5: Solve for x
    x = 31,166,883,587.52/206,066.40
  6. Step 6: Final answer
    x = 151,246.80

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