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Finding the Fourth Proportional to 161.80, 223.28 and 154.50

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Solution

The fourth proportional to 161.80, 223.28 and 154.50 is: 213.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.80 : 223.28 = 154.50 : x
  2. Step 2: Convert to fraction form
    161.80/223.28 = 154.50/x
  3. Step 3: Cross multiply
    161.80x = 223.28 × 154.50
  4. Step 4: Simplify right side
    161.80x = 34,496.76
  5. Step 5: Solve for x
    x = 34,496.76/161.80
  6. Step 6: Final answer
    x = 213.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.