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Finding the Fourth Proportional to 143.06, 213.64 and 112.28

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Solution

The fourth proportional to 143.06, 213.64 and 112.28 is: 167.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.06 : 213.64 = 112.28 : x
  2. Step 2: Convert to fraction form
    143.06/213.64 = 112.28/x
  3. Step 3: Cross multiply
    143.06x = 213.64 × 112.28
  4. Step 4: Simplify right side
    143.06x = 23,986.94
  5. Step 5: Solve for x
    x = 23,986.94/143.06
  6. Step 6: Final answer
    x = 167.67

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.