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Finding the Fourth Proportional to 159.77, 239.43 and 72.88

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Solution

The fourth proportional to 159.77, 239.43 and 72.88 is: 109.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.77 : 239.43 = 72.88 : x
  2. Step 2: Convert to fraction form
    159.77/239.43 = 72.88/x
  3. Step 3: Cross multiply
    159.77x = 239.43 × 72.88
  4. Step 4: Simplify right side
    159.77x = 17,450.27
  5. Step 5: Solve for x
    x = 17,450.27/159.77
  6. Step 6: Final answer
    x = 109.22

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