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Finding the Fourth Proportional to 161.19, 222.39 and 112.10

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Solution

The fourth proportional to 161.19, 222.39 and 112.10 is: 154.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.19 : 222.39 = 112.10 : x
  2. Step 2: Convert to fraction form
    161.19/222.39 = 112.10/x
  3. Step 3: Cross multiply
    161.19x = 222.39 × 112.10
  4. Step 4: Simplify right side
    161.19x = 24,928.81
  5. Step 5: Solve for x
    x = 24,928.81/161.19
  6. Step 6: Final answer
    x = 154.65

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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.