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Finding the Fourth Proportional to 161.61, 222.82 and 114.90

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Solution

The fourth proportional to 161.61, 222.82 and 114.90 is: 158.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.61 : 222.82 = 114.90 : x
  2. Step 2: Convert to fraction form
    161.61/222.82 = 114.90/x
  3. Step 3: Cross multiply
    161.61x = 222.82 × 114.90
  4. Step 4: Simplify right side
    161.61x = 25,602.02
  5. Step 5: Solve for x
    x = 25,602.02/161.61
  6. Step 6: Final answer
    x = 158.42

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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.