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Finding the Fourth Proportional to 161.52, 243.60 and 158.64

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Solution

The fourth proportional to 161.52, 243.60 and 158.64 is: 239.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.52 : 243.60 = 158.64 : x
  2. Step 2: Convert to fraction form
    161.52/243.60 = 158.64/x
  3. Step 3: Cross multiply
    161.52x = 243.60 × 158.64
  4. Step 4: Simplify right side
    161.52x = 38,644.70
  5. Step 5: Solve for x
    x = 38,644.70/161.52
  6. Step 6: Final answer
    x = 239.26

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.