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Finding the Fourth Proportional to 138,630.94, 191,289.06 and 78,200.03

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Solution

The fourth proportional to 138,630.94, 191,289.06 and 78,200.03 is: 107,903.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,630.94 : 191,289.06 = 78,200.03 : x
  2. Step 2: Convert to fraction form
    138,630.94/191,289.06 = 78,200.03/x
  3. Step 3: Cross multiply
    138,630.94x = 191,289.06 × 78,200.03
  4. Step 4: Simplify right side
    138,630.94x = 14,958,810,708.89
  5. Step 5: Solve for x
    x = 14,958,810,708.89/138,630.94
  6. Step 6: Final answer
    x = 107,903.84

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