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Finding the Fourth Proportional to 87,040.80, 130,658.40 and 81,330.30

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Solution

The fourth proportional to 87,040.80, 130,658.40 and 81,330.30 is: 122,086.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,040.80 : 130,658.40 = 81,330.30 : x
  2. Step 2: Convert to fraction form
    87,040.80/130,658.40 = 81,330.30/x
  3. Step 3: Cross multiply
    87,040.80x = 130,658.40 × 81,330.30
  4. Step 4: Simplify right side
    87,040.80x = 10,626,486,869.52
  5. Step 5: Solve for x
    x = 10,626,486,869.52/87,040.80
  6. Step 6: Final answer
    x = 122,086.27

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