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Finding the Fourth Proportional to 72,215.52, 99,655.55 and 39,949.30

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Solution

The fourth proportional to 72,215.52, 99,655.55 and 39,949.30 is: 55,129.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,215.52 : 99,655.55 = 39,949.30 : x
  2. Step 2: Convert to fraction form
    72,215.52/99,655.55 = 39,949.30/x
  3. Step 3: Cross multiply
    72,215.52x = 99,655.55 × 39,949.30
  4. Step 4: Simplify right side
    72,215.52x = 3,981,169,538.25
  5. Step 5: Solve for x
    x = 3,981,169,538.25/72,215.52
  6. Step 6: Final answer
    x = 55,129.00

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