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Finding the Fourth Proportional to 162.90, 224.78 and 92.95

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Solution

The fourth proportional to 162.90, 224.78 and 92.95 is: 128.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.90 : 224.78 = 92.95 : x
  2. Step 2: Convert to fraction form
    162.90/224.78 = 92.95/x
  3. Step 3: Cross multiply
    162.90x = 224.78 × 92.95
  4. Step 4: Simplify right side
    162.90x = 20,893.30
  5. Step 5: Solve for x
    x = 20,893.30/162.90
  6. Step 6: Final answer
    x = 128.26

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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.