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Finding the Fourth Proportional to 161.72, 241.40 and 155.64

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Solution

The fourth proportional to 161.72, 241.40 and 155.64 is: 232.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.72 : 241.40 = 155.64 : x
  2. Step 2: Convert to fraction form
    161.72/241.40 = 155.64/x
  3. Step 3: Cross multiply
    161.72x = 241.40 × 155.64
  4. Step 4: Simplify right side
    161.72x = 37,571.50
  5. Step 5: Solve for x
    x = 37,571.50/161.72
  6. Step 6: Final answer
    x = 232.32

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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.