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Finding the Fourth Proportional to 162.28, 223.35 and 138.88

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Solution

The fourth proportional to 162.28, 223.35 and 138.88 is: 191.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.28 : 223.35 = 138.88 : x
  2. Step 2: Convert to fraction form
    162.28/223.35 = 138.88/x
  3. Step 3: Cross multiply
    162.28x = 223.35 × 138.88
  4. Step 4: Simplify right side
    162.28x = 31,018.85
  5. Step 5: Solve for x
    x = 31,018.85/162.28
  6. Step 6: Final answer
    x = 191.14

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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.