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Finding the Fourth Proportional to 78,135.78, 107,825.16 and 45,869.89

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Solution

The fourth proportional to 78,135.78, 107,825.16 and 45,869.89 is: 63,299.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,135.78 : 107,825.16 = 45,869.89 : x
  2. Step 2: Convert to fraction form
    78,135.78/107,825.16 = 45,869.89/x
  3. Step 3: Cross multiply
    78,135.78x = 107,825.16 × 45,869.89
  4. Step 4: Simplify right side
    78,135.78x = 4,945,928,228.43
  5. Step 5: Solve for x
    x = 4,945,928,228.43/78,135.78
  6. Step 6: Final answer
    x = 63,299.15

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