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Finding the Fourth Proportional to 159.55, 220.21 and 119.84

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Solution

The fourth proportional to 159.55, 220.21 and 119.84 is: 165.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.55 : 220.21 = 119.84 : x
  2. Step 2: Convert to fraction form
    159.55/220.21 = 119.84/x
  3. Step 3: Cross multiply
    159.55x = 220.21 × 119.84
  4. Step 4: Simplify right side
    159.55x = 26,388.57
  5. Step 5: Solve for x
    x = 26,388.57/159.55
  6. Step 6: Final answer
    x = 165.40

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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.