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Finding the Fourth Proportional to 216,970.40, 325,507.56 and 90,540.31

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Solution

The fourth proportional to 216,970.40, 325,507.56 and 90,540.31 is: 135,832.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,970.40 : 325,507.56 = 90,540.31 : x
  2. Step 2: Convert to fraction form
    216,970.40/325,507.56 = 90,540.31/x
  3. Step 3: Cross multiply
    216,970.40x = 325,507.56 × 90,540.31
  4. Step 4: Simplify right side
    216,970.40x = 29,471,554,440.57
  5. Step 5: Solve for x
    x = 29,471,554,440.57/216,970.40
  6. Step 6: Final answer
    x = 135,832.15

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