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Finding the Fourth Proportional to 72,135.96, 99,545.76 and 40,305.09

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Solution

The fourth proportional to 72,135.96, 99,545.76 and 40,305.09 is: 55,619.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,135.96 : 99,545.76 = 40,305.09 : x
  2. Step 2: Convert to fraction form
    72,135.96/99,545.76 = 40,305.09/x
  3. Step 3: Cross multiply
    72,135.96x = 99,545.76 × 40,305.09
  4. Step 4: Simplify right side
    72,135.96x = 4,012,200,815.92
  5. Step 5: Solve for x
    x = 4,012,200,815.92/72,135.96
  6. Step 6: Final answer
    x = 55,619.98

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