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Finding the Fourth Proportional to 165.79, 228.78 and 92.11

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Solution

The fourth proportional to 165.79, 228.78 and 92.11 is: 127.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.79 : 228.78 = 92.11 : x
  2. Step 2: Convert to fraction form
    165.79/228.78 = 92.11/x
  3. Step 3: Cross multiply
    165.79x = 228.78 × 92.11
  4. Step 4: Simplify right side
    165.79x = 21,072.10
  5. Step 5: Solve for x
    x = 21,072.10/165.79
  6. Step 6: Final answer
    x = 127.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.