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Finding the Fourth Proportional to 159.60, 220.28 and 112.94

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Solution

The fourth proportional to 159.60, 220.28 and 112.94 is: 155.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.60 : 220.28 = 112.94 : x
  2. Step 2: Convert to fraction form
    159.60/220.28 = 112.94/x
  3. Step 3: Cross multiply
    159.60x = 220.28 × 112.94
  4. Step 4: Simplify right side
    159.60x = 24,876.76
  5. Step 5: Solve for x
    x = 24,876.76/159.60
  6. Step 6: Final answer
    x = 155.87

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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.