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Finding the Fourth Proportional to 161.32, 241.64 and 100.28

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Solution

The fourth proportional to 161.32, 241.64 and 100.28 is: 150.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.32 : 241.64 = 100.28 : x
  2. Step 2: Convert to fraction form
    161.32/241.64 = 100.28/x
  3. Step 3: Cross multiply
    161.32x = 241.64 × 100.28
  4. Step 4: Simplify right side
    161.32x = 24,231.66
  5. Step 5: Solve for x
    x = 24,231.66/161.32
  6. Step 6: Final answer
    x = 150.21

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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.