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Finding the Fourth Proportional to 172.99, 259.82 and 134.55

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Solution

The fourth proportional to 172.99, 259.82 and 134.55 is: 202.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.99 : 259.82 = 134.55 : x
  2. Step 2: Convert to fraction form
    172.99/259.82 = 134.55/x
  3. Step 3: Cross multiply
    172.99x = 259.82 × 134.55
  4. Step 4: Simplify right side
    172.99x = 34,958.78
  5. Step 5: Solve for x
    x = 34,958.78/172.99
  6. Step 6: Final answer
    x = 202.09

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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.