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Finding the Fourth Proportional to 80,643.06, 120,610.89 and 71,820.63

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Solution

The fourth proportional to 80,643.06, 120,610.89 and 71,820.63 is: 107,415.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,643.06 : 120,610.89 = 71,820.63 : x
  2. Step 2: Convert to fraction form
    80,643.06/120,610.89 = 71,820.63/x
  3. Step 3: Cross multiply
    80,643.06x = 120,610.89 × 71,820.63
  4. Step 4: Simplify right side
    80,643.06x = 8,662,350,104.66
  5. Step 5: Solve for x
    x = 8,662,350,104.66/80,643.06
  6. Step 6: Final answer
    x = 107,415.94

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