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Finding the Fourth Proportional to 172.05, 237.44 and 98.39

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Solution

The fourth proportional to 172.05, 237.44 and 98.39 is: 135.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.05 : 237.44 = 98.39 : x
  2. Step 2: Convert to fraction form
    172.05/237.44 = 98.39/x
  3. Step 3: Cross multiply
    172.05x = 237.44 × 98.39
  4. Step 4: Simplify right side
    172.05x = 23,360.78
  5. Step 5: Solve for x
    x = 23,360.78/172.05
  6. Step 6: Final answer
    x = 135.78

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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.