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Finding the Fourth Proportional to 71,150.40, 106,638.12 and 39,920.04

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Solution

The fourth proportional to 71,150.40, 106,638.12 and 39,920.04 is: 59,830.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,150.40 : 106,638.12 = 39,920.04 : x
  2. Step 2: Convert to fraction form
    71,150.40/106,638.12 = 39,920.04/x
  3. Step 3: Cross multiply
    71,150.40x = 106,638.12 × 39,920.04
  4. Step 4: Simplify right side
    71,150.40x = 4,256,998,015.92
  5. Step 5: Solve for x
    x = 4,256,998,015.92/71,150.40
  6. Step 6: Final answer
    x = 59,830.98

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