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Finding the Fourth Proportional to 192.64, 265.80 and 115

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Solution

The fourth proportional to 192.64, 265.80 and 115 is: 158.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.64 : 265.80 = 115 : x
  2. Step 2: Convert to fraction form
    192.64/265.80 = 115/x
  3. Step 3: Cross multiply
    192.64x = 265.80 × 115
  4. Step 4: Simplify right side
    192.64x = 30,567
  5. Step 5: Solve for x
    x = 30,567/192.64
  6. Step 6: Final answer
    x = 158.67

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