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Finding the Fourth Proportional to 162.15, 223.65 and 96.61

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Solution

The fourth proportional to 162.15, 223.65 and 96.61 is: 133.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.15 : 223.65 = 96.61 : x
  2. Step 2: Convert to fraction form
    162.15/223.65 = 96.61/x
  3. Step 3: Cross multiply
    162.15x = 223.65 × 96.61
  4. Step 4: Simplify right side
    162.15x = 21,606.83
  5. Step 5: Solve for x
    x = 21,606.83/162.15
  6. Step 6: Final answer
    x = 133.25

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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.