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Finding the Fourth Proportional to 172.27, 237.63 and 106.84

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Solution

The fourth proportional to 172.27, 237.63 and 106.84 is: 147.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.27 : 237.63 = 106.84 : x
  2. Step 2: Convert to fraction form
    172.27/237.63 = 106.84/x
  3. Step 3: Cross multiply
    172.27x = 237.63 × 106.84
  4. Step 4: Simplify right side
    172.27x = 25,388.39
  5. Step 5: Solve for x
    x = 25,388.39/172.27
  6. Step 6: Final answer
    x = 147.38

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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.