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Finding the Fourth Proportional to 165.78, 228.69 and 110.43

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Solution

The fourth proportional to 165.78, 228.69 and 110.43 is: 152.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.78 : 228.69 = 110.43 : x
  2. Step 2: Convert to fraction form
    165.78/228.69 = 110.43/x
  3. Step 3: Cross multiply
    165.78x = 228.69 × 110.43
  4. Step 4: Simplify right side
    165.78x = 25,254.24
  5. Step 5: Solve for x
    x = 25,254.24/165.78
  6. Step 6: Final answer
    x = 152.34

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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.