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Finding the Fourth Proportional to 165.55, 228.45 and 91.86

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Solution

The fourth proportional to 165.55, 228.45 and 91.86 is: 126.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.55 : 228.45 = 91.86 : x
  2. Step 2: Convert to fraction form
    165.55/228.45 = 91.86/x
  3. Step 3: Cross multiply
    165.55x = 228.45 × 91.86
  4. Step 4: Simplify right side
    165.55x = 20,985.67
  5. Step 5: Solve for x
    x = 20,985.67/165.55
  6. Step 6: Final answer
    x = 126.76

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