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Finding the Fourth Proportional to 172.35, 237.82 and 97.66

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Solution

The fourth proportional to 172.35, 237.82 and 97.66 is: 134.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.35 : 237.82 = 97.66 : x
  2. Step 2: Convert to fraction form
    172.35/237.82 = 97.66/x
  3. Step 3: Cross multiply
    172.35x = 237.82 × 97.66
  4. Step 4: Simplify right side
    172.35x = 23,225.50
  5. Step 5: Solve for x
    x = 23,225.50/172.35
  6. Step 6: Final answer
    x = 134.76

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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.