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Finding the Fourth Proportional to 159.68, 220.26 and 109.87

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Solution

The fourth proportional to 159.68, 220.26 and 109.87 is: 151.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.68 : 220.26 = 109.87 : x
  2. Step 2: Convert to fraction form
    159.68/220.26 = 109.87/x
  3. Step 3: Cross multiply
    159.68x = 220.26 × 109.87
  4. Step 4: Simplify right side
    159.68x = 24,199.83
  5. Step 5: Solve for x
    x = 24,199.83/159.68
  6. Step 6: Final answer
    x = 151.55

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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.