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Finding the Fourth Proportional to 172.04, 258.17 and 69.41

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Solution

The fourth proportional to 172.04, 258.17 and 69.41 is: 104.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.04 : 258.17 = 69.41 : x
  2. Step 2: Convert to fraction form
    172.04/258.17 = 69.41/x
  3. Step 3: Cross multiply
    172.04x = 258.17 × 69.41
  4. Step 4: Simplify right side
    172.04x = 17,917.94
  5. Step 5: Solve for x
    x = 17,917.94/172.04
  6. Step 6: Final answer
    x = 104.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.