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Finding the Fourth Proportional to 162.32, 223.72 and 129.68

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Solution

The fourth proportional to 162.32, 223.72 and 129.68 is: 178.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.32 : 223.72 = 129.68 : x
  2. Step 2: Convert to fraction form
    162.32/223.72 = 129.68/x
  3. Step 3: Cross multiply
    162.32x = 223.72 × 129.68
  4. Step 4: Simplify right side
    162.32x = 29,012.01
  5. Step 5: Solve for x
    x = 29,012.01/162.32
  6. Step 6: Final answer
    x = 178.73

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.