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Finding the Fourth Proportional to 147,978, 204,209.64 and 80,910

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Solution

The fourth proportional to 147,978, 204,209.64 and 80,910 is: 111,655.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,978 : 204,209.64 = 80,910 : x
  2. Step 2: Convert to fraction form
    147,978/204,209.64 = 80,910/x
  3. Step 3: Cross multiply
    147,978x = 204,209.64 × 80,910
  4. Step 4: Simplify right side
    147,978x = 16,522,601,972.40
  5. Step 5: Solve for x
    x = 16,522,601,972.40/147,978
  6. Step 6: Final answer
    x = 111,655.80

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