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Finding the Fourth Proportional to 173.07, 259.20 and 142.43

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Solution

The fourth proportional to 173.07, 259.20 and 142.43 is: 213.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.07 : 259.20 = 142.43 : x
  2. Step 2: Convert to fraction form
    173.07/259.20 = 142.43/x
  3. Step 3: Cross multiply
    173.07x = 259.20 × 142.43
  4. Step 4: Simplify right side
    173.07x = 36,916.56
  5. Step 5: Solve for x
    x = 36,916.56/173.07
  6. Step 6: Final answer
    x = 213.30

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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.