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Finding the Fourth Proportional to 156.28, 215.96 and 109.84

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Solution

The fourth proportional to 156.28, 215.96 and 109.84 is: 151.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.28 : 215.96 = 109.84 : x
  2. Step 2: Convert to fraction form
    156.28/215.96 = 109.84/x
  3. Step 3: Cross multiply
    156.28x = 215.96 × 109.84
  4. Step 4: Simplify right side
    156.28x = 23,721.05
  5. Step 5: Solve for x
    x = 23,721.05/156.28
  6. Step 6: Final answer
    x = 151.79

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