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Finding the Fourth Proportional to 188.56, 282.71 and 72.91

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Solution

The fourth proportional to 188.56, 282.71 and 72.91 is: 109.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.56 : 282.71 = 72.91 : x
  2. Step 2: Convert to fraction form
    188.56/282.71 = 72.91/x
  3. Step 3: Cross multiply
    188.56x = 282.71 × 72.91
  4. Step 4: Simplify right side
    188.56x = 20,612.92
  5. Step 5: Solve for x
    x = 20,612.92/188.56
  6. Step 6: Final answer
    x = 109.32

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