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Finding the Fourth Proportional to 162.31, 223.83 and 118.35

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Solution

The fourth proportional to 162.31, 223.83 and 118.35 is: 163.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.31 : 223.83 = 118.35 : x
  2. Step 2: Convert to fraction form
    162.31/223.83 = 118.35/x
  3. Step 3: Cross multiply
    162.31x = 223.83 × 118.35
  4. Step 4: Simplify right side
    162.31x = 26,490.28
  5. Step 5: Solve for x
    x = 26,490.28/162.31
  6. Step 6: Final answer
    x = 163.21

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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.