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Finding the Fourth Proportional to 90,784.80, 136,133.46 and 31,619.16

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Solution

The fourth proportional to 90,784.80, 136,133.46 and 31,619.16 is: 47,413.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,784.80 : 136,133.46 = 31,619.16 : x
  2. Step 2: Convert to fraction form
    90,784.80/136,133.46 = 31,619.16/x
  3. Step 3: Cross multiply
    90,784.80x = 136,133.46 × 31,619.16
  4. Step 4: Simplify right side
    90,784.80x = 4,304,425,653.09
  5. Step 5: Solve for x
    x = 4,304,425,653.09/90,784.80
  6. Step 6: Final answer
    x = 47,413.51

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