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Finding the Fourth Proportional to 161.60, 222.72 and 120.08

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Solution

The fourth proportional to 161.60, 222.72 and 120.08 is: 165.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.60 : 222.72 = 120.08 : x
  2. Step 2: Convert to fraction form
    161.60/222.72 = 120.08/x
  3. Step 3: Cross multiply
    161.60x = 222.72 × 120.08
  4. Step 4: Simplify right side
    161.60x = 26,744.22
  5. Step 5: Solve for x
    x = 26,744.22/161.60
  6. Step 6: Final answer
    x = 165.50

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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.