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Finding the Fourth Proportional to 159.84, 220.20 and 118.20

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Solution

The fourth proportional to 159.84, 220.20 and 118.20 is: 162.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.84 : 220.20 = 118.20 : x
  2. Step 2: Convert to fraction form
    159.84/220.20 = 118.20/x
  3. Step 3: Cross multiply
    159.84x = 220.20 × 118.20
  4. Step 4: Simplify right side
    159.84x = 26,027.64
  5. Step 5: Solve for x
    x = 26,027.64/159.84
  6. Step 6: Final answer
    x = 162.84

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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.