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Finding the Fourth Proportional to 80,600.80, 120,998.40 and 45,090.40

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Solution

The fourth proportional to 80,600.80, 120,998.40 and 45,090.40 is: 67,689.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,600.80 : 120,998.40 = 45,090.40 : x
  2. Step 2: Convert to fraction form
    80,600.80/120,998.40 = 45,090.40/x
  3. Step 3: Cross multiply
    80,600.80x = 120,998.40 × 45,090.40
  4. Step 4: Simplify right side
    80,600.80x = 5,455,866,255.36
  5. Step 5: Solve for x
    x = 5,455,866,255.36/80,600.80
  6. Step 6: Final answer
    x = 67,689.98

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