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Finding the Fourth Proportional to 165.80, 228.80 and 92.10

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Solution

The fourth proportional to 165.80, 228.80 and 92.10 is: 127.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.80 : 228.80 = 92.10 : x
  2. Step 2: Convert to fraction form
    165.80/228.80 = 92.10/x
  3. Step 3: Cross multiply
    165.80x = 228.80 × 92.10
  4. Step 4: Simplify right side
    165.80x = 21,072.02
  5. Step 5: Solve for x
    x = 21,072.02/165.80
  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.