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Finding the Fourth Proportional to 76,881.49, 105,938.99 and 56,706.41

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Solution

The fourth proportional to 76,881.49, 105,938.99 and 56,706.41 is: 78,138.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,881.49 : 105,938.99 = 56,706.41 : x
  2. Step 2: Convert to fraction form
    76,881.49/105,938.99 = 56,706.41/x
  3. Step 3: Cross multiply
    76,881.49x = 105,938.99 × 56,706.41
  4. Step 4: Simplify right side
    76,881.49x = 6,007,419,995.89
  5. Step 5: Solve for x
    x = 6,007,419,995.89/76,881.49
  6. Step 6: Final answer
    x = 78,138.71

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