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Finding the Fourth Proportional to 162.48, 223.24 and 129.67

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Solution

The fourth proportional to 162.48, 223.24 and 129.67 is: 178.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.48 : 223.24 = 129.67 : x
  2. Step 2: Convert to fraction form
    162.48/223.24 = 129.67/x
  3. Step 3: Cross multiply
    162.48x = 223.24 × 129.67
  4. Step 4: Simplify right side
    162.48x = 28,947.53
  5. Step 5: Solve for x
    x = 28,947.53/162.48
  6. Step 6: Final answer
    x = 178.16

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.