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Finding the Fourth Proportional to 119.96, 165.56 and 68.20

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Solution

The fourth proportional to 119.96, 165.56 and 68.20 is: 94.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.96 : 165.56 = 68.20 : x
  2. Step 2: Convert to fraction form
    119.96/165.56 = 68.20/x
  3. Step 3: Cross multiply
    119.96x = 165.56 × 68.20
  4. Step 4: Simplify right side
    119.96x = 11,291.19
  5. Step 5: Solve for x
    x = 11,291.19/119.96
  6. Step 6: Final answer
    x = 94.12

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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.