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Finding the Fourth Proportional to 81,290.13, 112,218.73 and 61,154.68

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Solution

The fourth proportional to 81,290.13, 112,218.73 and 61,154.68 is: 84,422.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,290.13 : 112,218.73 = 61,154.68 : x
  2. Step 2: Convert to fraction form
    81,290.13/112,218.73 = 61,154.68/x
  3. Step 3: Cross multiply
    81,290.13x = 112,218.73 × 61,154.68
  4. Step 4: Simplify right side
    81,290.13x = 6,862,700,523.16
  5. Step 5: Solve for x
    x = 6,862,700,523.16/81,290.13
  6. Step 6: Final answer
    x = 84,422.31

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