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Finding the Fourth Proportional to 162.18, 223.79 and 88.49

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Solution

The fourth proportional to 162.18, 223.79 and 88.49 is: 122.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.18 : 223.79 = 88.49 : x
  2. Step 2: Convert to fraction form
    162.18/223.79 = 88.49/x
  3. Step 3: Cross multiply
    162.18x = 223.79 × 88.49
  4. Step 4: Simplify right side
    162.18x = 19,803.96
  5. Step 5: Solve for x
    x = 19,803.96/162.18
  6. Step 6: Final answer
    x = 122.11

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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.