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Finding the Fourth Proportional to 109.88, 151.68 and 65.64

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Solution

The fourth proportional to 109.88, 151.68 and 65.64 is: 90.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.88 : 151.68 = 65.64 : x
  2. Step 2: Convert to fraction form
    109.88/151.68 = 65.64/x
  3. Step 3: Cross multiply
    109.88x = 151.68 × 65.64
  4. Step 4: Simplify right side
    109.88x = 9,956.24
  5. Step 5: Solve for x
    x = 9,956.24/109.88
  6. Step 6: Final answer
    x = 90.61

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