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Finding the Fourth Proportional to 126,309.28, 189,408.80 and 67,130.72

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Solution

The fourth proportional to 126,309.28, 189,408.80 and 67,130.72 is: 100,666.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,309.28 : 189,408.80 = 67,130.72 : x
  2. Step 2: Convert to fraction form
    126,309.28/189,408.80 = 67,130.72/x
  3. Step 3: Cross multiply
    126,309.28x = 189,408.80 × 67,130.72
  4. Step 4: Simplify right side
    126,309.28x = 12,715,149,118.34
  5. Step 5: Solve for x
    x = 12,715,149,118.34/126,309.28
  6. Step 6: Final answer
    x = 100,666.78

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