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Finding the Fourth Proportional to 161.17, 222.46 and 102.98

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Solution

The fourth proportional to 161.17, 222.46 and 102.98 is: 142.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.17 : 222.46 = 102.98 : x
  2. Step 2: Convert to fraction form
    161.17/222.46 = 102.98/x
  3. Step 3: Cross multiply
    161.17x = 222.46 × 102.98
  4. Step 4: Simplify right side
    161.17x = 22,909.23
  5. Step 5: Solve for x
    x = 22,909.23/161.17
  6. Step 6: Final answer
    x = 142.15

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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.