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Finding the Fourth Proportional to 127.06, 190.70 and 66.21

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Solution

The fourth proportional to 127.06, 190.70 and 66.21 is: 99.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.06 : 190.70 = 66.21 : x
  2. Step 2: Convert to fraction form
    127.06/190.70 = 66.21/x
  3. Step 3: Cross multiply
    127.06x = 190.70 × 66.21
  4. Step 4: Simplify right side
    127.06x = 12,626.39
  5. Step 5: Solve for x
    x = 12,626.39/127.06
  6. Step 6: Final answer
    x = 99.37

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