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Finding the Fourth Proportional to 92,890.28, 128,171.94 and 55,173.80

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Solution

The fourth proportional to 92,890.28, 128,171.94 and 55,173.80 is: 76,129.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,890.28 : 128,171.94 = 55,173.80 : x
  2. Step 2: Convert to fraction form
    92,890.28/128,171.94 = 55,173.80/x
  3. Step 3: Cross multiply
    92,890.28x = 128,171.94 × 55,173.80
  4. Step 4: Simplify right side
    92,890.28x = 7,071,732,983.17
  5. Step 5: Solve for x
    x = 7,071,732,983.17/92,890.28
  6. Step 6: Final answer
    x = 76,129.96

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