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Finding the Fourth Proportional to 78,142.79, 107,836.92 and 42,333.71

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Solution

The fourth proportional to 78,142.79, 107,836.92 and 42,333.71 is: 58,420.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,142.79 : 107,836.92 = 42,333.71 : x
  2. Step 2: Convert to fraction form
    78,142.79/107,836.92 = 42,333.71/x
  3. Step 3: Cross multiply
    78,142.79x = 107,836.92 × 42,333.71
  4. Step 4: Simplify right side
    78,142.79x = 4,565,136,359.39
  5. Step 5: Solve for x
    x = 4,565,136,359.39/78,142.79
  6. Step 6: Final answer
    x = 58,420.44

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