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Finding the Fourth Proportional to 128,564.91, 177,360.66 and 83,257.49

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Solution

The fourth proportional to 128,564.91, 177,360.66 and 83,257.49 is: 114,857.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,564.91 : 177,360.66 = 83,257.49 : x
  2. Step 2: Convert to fraction form
    128,564.91/177,360.66 = 83,257.49/x
  3. Step 3: Cross multiply
    128,564.91x = 177,360.66 × 83,257.49
  4. Step 4: Simplify right side
    128,564.91x = 14,766,603,819.75
  5. Step 5: Solve for x
    x = 14,766,603,819.75/128,564.91
  6. Step 6: Final answer
    x = 114,857.19

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