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Finding the Fourth Proportional to 159.65, 220.20 and 101.33

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Solution

The fourth proportional to 159.65, 220.20 and 101.33 is: 139.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.65 : 220.20 = 101.33 : x
  2. Step 2: Convert to fraction form
    159.65/220.20 = 101.33/x
  3. Step 3: Cross multiply
    159.65x = 220.20 × 101.33
  4. Step 4: Simplify right side
    159.65x = 22,311.77
  5. Step 5: Solve for x
    x = 22,311.77/159.65
  6. Step 6: Final answer
    x = 139.76

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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.