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Finding the Fourth Proportional to 162.44, 224.13 and 100.28

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Solution

The fourth proportional to 162.44, 224.13 and 100.28 is: 138.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.44 : 224.13 = 100.28 : x
  2. Step 2: Convert to fraction form
    162.44/224.13 = 100.28/x
  3. Step 3: Cross multiply
    162.44x = 224.13 × 100.28
  4. Step 4: Simplify right side
    162.44x = 22,474.64
  5. Step 5: Solve for x
    x = 22,474.64/162.44
  6. Step 6: Final answer
    x = 138.36

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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.