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Finding the Fourth Proportional to 90.26, 135.39 and 66.14

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Solution

The fourth proportional to 90.26, 135.39 and 66.14 is: 99.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    90.26 : 135.39 = 66.14 : x
  2. Step 2: Convert to fraction form
    90.26/135.39 = 66.14/x
  3. Step 3: Cross multiply
    90.26x = 135.39 × 66.14
  4. Step 4: Simplify right side
    90.26x = 8,954.69
  5. Step 5: Solve for x
    x = 8,954.69/90.26
  6. Step 6: Final answer
    x = 99.21

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