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Finding the Fourth Proportional to 72,987.86, 100,723.19 and 39,453.86

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Solution

The fourth proportional to 72,987.86, 100,723.19 and 39,453.86 is: 54,446.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,987.86 : 100,723.19 = 39,453.86 : x
  2. Step 2: Convert to fraction form
    72,987.86/100,723.19 = 39,453.86/x
  3. Step 3: Cross multiply
    72,987.86x = 100,723.19 × 39,453.86
  4. Step 4: Simplify right side
    72,987.86x = 3,973,917,936.13
  5. Step 5: Solve for x
    x = 3,973,917,936.13/72,987.86
  6. Step 6: Final answer
    x = 54,446.29

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