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Finding the Fourth Proportional to 161.46, 222.81 and 117.98

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Solution

The fourth proportional to 161.46, 222.81 and 117.98 is: 162.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.46 : 222.81 = 117.98 : x
  2. Step 2: Convert to fraction form
    161.46/222.81 = 117.98/x
  3. Step 3: Cross multiply
    161.46x = 222.81 × 117.98
  4. Step 4: Simplify right side
    161.46x = 26,287.12
  5. Step 5: Solve for x
    x = 26,287.12/161.46
  6. Step 6: Final answer
    x = 162.81

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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.