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Finding the Fourth Proportional to 165.90, 248.90 and 97.42

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Solution

The fourth proportional to 165.90, 248.90 and 97.42 is: 146.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.90 : 248.90 = 97.42 : x
  2. Step 2: Convert to fraction form
    165.90/248.90 = 97.42/x
  3. Step 3: Cross multiply
    165.90x = 248.90 × 97.42
  4. Step 4: Simplify right side
    165.90x = 24,247.84
  5. Step 5: Solve for x
    x = 24,247.84/165.90
  6. Step 6: Final answer
    x = 146.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.