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Finding the Fourth Proportional to 172.40, 237.89 and 102.49

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Solution

The fourth proportional to 172.40, 237.89 and 102.49 is: 141.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.40 : 237.89 = 102.49 : x
  2. Step 2: Convert to fraction form
    172.40/237.89 = 102.49/x
  3. Step 3: Cross multiply
    172.40x = 237.89 × 102.49
  4. Step 4: Simplify right side
    172.40x = 24,381.01
  5. Step 5: Solve for x
    x = 24,381.01/172.40
  6. Step 6: Final answer
    x = 141.43

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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.