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Finding the Fourth Proportional to 165.61, 248.60 and 113.89

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Solution

The fourth proportional to 165.61, 248.60 and 113.89 is: 170.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.61 : 248.60 = 113.89 : x
  2. Step 2: Convert to fraction form
    165.61/248.60 = 113.89/x
  3. Step 3: Cross multiply
    165.61x = 248.60 × 113.89
  4. Step 4: Simplify right side
    165.61x = 28,313.18
  5. Step 5: Solve for x
    x = 28,313.18/165.61
  6. Step 6: Final answer
    x = 170.96

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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.