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Finding the Fourth Proportional to 87,311.40, 130,925.64 and 39,912.43

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Solution

The fourth proportional to 87,311.40, 130,925.64 and 39,912.43 is: 59,849.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,311.40 : 130,925.64 = 39,912.43 : x
  2. Step 2: Convert to fraction form
    87,311.40/130,925.64 = 39,912.43/x
  3. Step 3: Cross multiply
    87,311.40x = 130,925.64 × 39,912.43
  4. Step 4: Simplify right side
    87,311.40x = 5,225,559,914.83
  5. Step 5: Solve for x
    x = 5,225,559,914.83/87,311.40
  6. Step 6: Final answer
    x = 59,849.69

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