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Finding the Fourth Proportional to 172.36, 237.85 and 102.39

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Solution

The fourth proportional to 172.36, 237.85 and 102.39 is: 141.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.36 : 237.85 = 102.39 : x
  2. Step 2: Convert to fraction form
    172.36/237.85 = 102.39/x
  3. Step 3: Cross multiply
    172.36x = 237.85 × 102.39
  4. Step 4: Simplify right side
    172.36x = 24,353.46
  5. Step 5: Solve for x
    x = 24,353.46/172.36
  6. Step 6: Final answer
    x = 141.29

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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.