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Finding the Fourth Proportional to 159.43, 220.08 and 112.81

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Solution

The fourth proportional to 159.43, 220.08 and 112.81 is: 155.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.43 : 220.08 = 112.81 : x
  2. Step 2: Convert to fraction form
    159.43/220.08 = 112.81/x
  3. Step 3: Cross multiply
    159.43x = 220.08 × 112.81
  4. Step 4: Simplify right side
    159.43x = 24,827.22
  5. Step 5: Solve for x
    x = 24,827.22/159.43
  6. Step 6: Final answer
    x = 155.72

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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.