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Finding the Fourth Proportional to 80,042.20, 120,063.36 and 20,877.80

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Solution

The fourth proportional to 80,042.20, 120,063.36 and 20,877.80 is: 31,316.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,042.20 : 120,063.36 = 20,877.80 : x
  2. Step 2: Convert to fraction form
    80,042.20/120,063.36 = 20,877.80/x
  3. Step 3: Cross multiply
    80,042.20x = 120,063.36 × 20,877.80
  4. Step 4: Simplify right side
    80,042.20x = 2,506,658,817.41
  5. Step 5: Solve for x
    x = 2,506,658,817.41/80,042.20
  6. Step 6: Final answer
    x = 31,316.72

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