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Finding the Fourth Proportional to 162.29, 223.66 and 115.66

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Solution

The fourth proportional to 162.29, 223.66 and 115.66 is: 159.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.29 : 223.66 = 115.66 : x
  2. Step 2: Convert to fraction form
    162.29/223.66 = 115.66/x
  3. Step 3: Cross multiply
    162.29x = 223.66 × 115.66
  4. Step 4: Simplify right side
    162.29x = 25,867.67
  5. Step 5: Solve for x
    x = 25,867.67/162.29
  6. Step 6: Final answer
    x = 159.40

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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.