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Finding the Fourth Proportional to 92,890.15, 128,199.35 and 55,164.40

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Solution

The fourth proportional to 92,890.15, 128,199.35 and 55,164.40 is: 76,133.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,890.15 : 128,199.35 = 55,164.40 : x
  2. Step 2: Convert to fraction form
    92,890.15/128,199.35 = 55,164.40/x
  3. Step 3: Cross multiply
    92,890.15x = 128,199.35 × 55,164.40
  4. Step 4: Simplify right side
    92,890.15x = 7,072,040,223.14
  5. Step 5: Solve for x
    x = 7,072,040,223.14/92,890.15
  6. Step 6: Final answer
    x = 76,133.37

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