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Finding the Fourth Proportional to 119.96, 165.54 and 70.20

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Solution

The fourth proportional to 119.96, 165.54 and 70.20 is: 96.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.96 : 165.54 = 70.20 : x
  2. Step 2: Convert to fraction form
    119.96/165.54 = 70.20/x
  3. Step 3: Cross multiply
    119.96x = 165.54 × 70.20
  4. Step 4: Simplify right side
    119.96x = 11,620.91
  5. Step 5: Solve for x
    x = 11,620.91/119.96
  6. Step 6: Final answer
    x = 96.87

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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.