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Finding the Fourth Proportional to 117.69, 176.71 and 66.43

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Solution

The fourth proportional to 117.69, 176.71 and 66.43 is: 99.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.69 : 176.71 = 66.43 : x
  2. Step 2: Convert to fraction form
    117.69/176.71 = 66.43/x
  3. Step 3: Cross multiply
    117.69x = 176.71 × 66.43
  4. Step 4: Simplify right side
    117.69x = 11,738.85
  5. Step 5: Solve for x
    x = 11,738.85/117.69
  6. Step 6: Final answer
    x = 99.74

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