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Finding the Fourth Proportional to 85,507.25, 128,277.89 and 26,340.40

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Solution

The fourth proportional to 85,507.25, 128,277.89 and 26,340.40 is: 39,515.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,507.25 : 128,277.89 = 26,340.40 : x
  2. Step 2: Convert to fraction form
    85,507.25/128,277.89 = 26,340.40/x
  3. Step 3: Cross multiply
    85,507.25x = 128,277.89 × 26,340.40
  4. Step 4: Simplify right side
    85,507.25x = 3,378,890,160.66
  5. Step 5: Solve for x
    x = 3,378,890,160.66/85,507.25
  6. Step 6: Final answer
    x = 39,515.83

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