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Finding the Fourth Proportional to 278,948.64, 418,187.76 and 121,058.16

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Solution

The fourth proportional to 278,948.64, 418,187.76 and 121,058.16 is: 181,485.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,948.64 : 418,187.76 = 121,058.16 : x
  2. Step 2: Convert to fraction form
    278,948.64/418,187.76 = 121,058.16/x
  3. Step 3: Cross multiply
    278,948.64x = 418,187.76 × 121,058.16
  4. Step 4: Simplify right side
    278,948.64x = 50,625,040,760.12
  5. Step 5: Solve for x
    x = 50,625,040,760.12/278,948.64
  6. Step 6: Final answer
    x = 181,485.17

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