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Finding the Fourth Proportional to 162.78, 224.62 and 92.85

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Solution

The fourth proportional to 162.78, 224.62 and 92.85 is: 128.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.78 : 224.62 = 92.85 : x
  2. Step 2: Convert to fraction form
    162.78/224.62 = 92.85/x
  3. Step 3: Cross multiply
    162.78x = 224.62 × 92.85
  4. Step 4: Simplify right side
    162.78x = 20,854.89
  5. Step 5: Solve for x
    x = 20,854.89/162.78
  6. Step 6: Final answer
    x = 128.12

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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.