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Finding the Fourth Proportional to 81,080.29, 121,675.80 and 28,489.78

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Solution

The fourth proportional to 81,080.29, 121,675.80 and 28,489.78 is: 42,754.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,080.29 : 121,675.80 = 28,489.78 : x
  2. Step 2: Convert to fraction form
    81,080.29/121,675.80 = 28,489.78/x
  3. Step 3: Cross multiply
    81,080.29x = 121,675.80 × 28,489.78
  4. Step 4: Simplify right side
    81,080.29x = 3,466,516,773.32
  5. Step 5: Solve for x
    x = 3,466,516,773.32/81,080.29
  6. Step 6: Final answer
    x = 42,754.12

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