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Finding the Fourth Proportional to 162.22, 243.24 and 64.72

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Solution

The fourth proportional to 162.22, 243.24 and 64.72 is: 97.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.22 : 243.24 = 64.72 : x
  2. Step 2: Convert to fraction form
    162.22/243.24 = 64.72/x
  3. Step 3: Cross multiply
    162.22x = 243.24 × 64.72
  4. Step 4: Simplify right side
    162.22x = 15,741.52
  5. Step 5: Solve for x
    x = 15,741.52/162.22
  6. Step 6: Final answer
    x = 97.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.