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Finding the Fourth Proportional to 90,912.97, 136,390.91 and 28,583.47

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Solution

The fourth proportional to 90,912.97, 136,390.91 and 28,583.47 is: 42,881.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,912.97 : 136,390.91 = 28,583.47 : x
  2. Step 2: Convert to fraction form
    90,912.97/136,390.91 = 28,583.47/x
  3. Step 3: Cross multiply
    90,912.97x = 136,390.91 × 28,583.47
  4. Step 4: Simplify right side
    90,912.97x = 3,898,525,484.26
  5. Step 5: Solve for x
    x = 3,898,525,484.26/90,912.97
  6. Step 6: Final answer
    x = 42,881.95

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