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Finding the Fourth Proportional to 172.05, 236.87 and 130.34

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Solution

The fourth proportional to 172.05, 236.87 and 130.34 is: 179.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.05 : 236.87 = 130.34 : x
  2. Step 2: Convert to fraction form
    172.05/236.87 = 130.34/x
  3. Step 3: Cross multiply
    172.05x = 236.87 × 130.34
  4. Step 4: Simplify right side
    172.05x = 30,871.80
  5. Step 5: Solve for x
    x = 30,871.80/172.05
  6. Step 6: Final answer
    x = 179.44

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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.