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Finding the Fourth Proportional to 75,621.29, 113,423.29 and 20,221.61

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Solution

The fourth proportional to 75,621.29, 113,423.29 and 20,221.61 is: 30,330.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,621.29 : 113,423.29 = 20,221.61 : x
  2. Step 2: Convert to fraction form
    75,621.29/113,423.29 = 20,221.61/x
  3. Step 3: Cross multiply
    75,621.29x = 113,423.29 × 20,221.61
  4. Step 4: Simplify right side
    75,621.29x = 2,293,601,535.30
  5. Step 5: Solve for x
    x = 2,293,601,535.30/75,621.29
  6. Step 6: Final answer
    x = 30,330.10

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