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Finding the Fourth Proportional to 216,636.25, 324,924.30 and 66,881.47

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Solution

The fourth proportional to 216,636.25, 324,924.30 and 66,881.47 is: 100,312.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,636.25 : 324,924.30 = 66,881.47 : x
  2. Step 2: Convert to fraction form
    216,636.25/324,924.30 = 66,881.47/x
  3. Step 3: Cross multiply
    216,636.25x = 324,924.30 × 66,881.47
  4. Step 4: Simplify right side
    216,636.25x = 21,731,414,822.72
  5. Step 5: Solve for x
    x = 21,731,414,822.72/216,636.25
  6. Step 6: Final answer
    x = 100,312.92

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