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Finding the Fourth Proportional to 161.56, 240.69 and 157.96

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Solution

The fourth proportional to 161.56, 240.69 and 157.96 is: 235.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.56 : 240.69 = 157.96 : x
  2. Step 2: Convert to fraction form
    161.56/240.69 = 157.96/x
  3. Step 3: Cross multiply
    161.56x = 240.69 × 157.96
  4. Step 4: Simplify right side
    161.56x = 38,019.39
  5. Step 5: Solve for x
    x = 38,019.39/161.56
  6. Step 6: Final answer
    x = 235.33

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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.