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Finding the Fourth Proportional to 159.66, 221.22 and 157.71

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Solution

The fourth proportional to 159.66, 221.22 and 157.71 is: 218.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.66 : 221.22 = 157.71 : x
  2. Step 2: Convert to fraction form
    159.66/221.22 = 157.71/x
  3. Step 3: Cross multiply
    159.66x = 221.22 × 157.71
  4. Step 4: Simplify right side
    159.66x = 34,888.61
  5. Step 5: Solve for x
    x = 34,888.61/159.66
  6. Step 6: Final answer
    x = 218.52

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.