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Finding the Fourth Proportional to 110.90, 165.48 and 92.90

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Solution

The fourth proportional to 110.90, 165.48 and 92.90 is: 138.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.90 : 165.48 = 92.90 : x
  2. Step 2: Convert to fraction form
    110.90/165.48 = 92.90/x
  3. Step 3: Cross multiply
    110.90x = 165.48 × 92.90
  4. Step 4: Simplify right side
    110.90x = 15,373.09
  5. Step 5: Solve for x
    x = 15,373.09/110.90
  6. Step 6: Final answer
    x = 138.62

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.