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Finding the Fourth Proportional to 172.59, 239.77 and 170.99

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Solution

The fourth proportional to 172.59, 239.77 and 170.99 is: 237.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.59 : 239.77 = 170.99 : x
  2. Step 2: Convert to fraction form
    172.59/239.77 = 170.99/x
  3. Step 3: Cross multiply
    172.59x = 239.77 × 170.99
  4. Step 4: Simplify right side
    172.59x = 40,998.27
  5. Step 5: Solve for x
    x = 40,998.27/172.59
  6. Step 6: Final answer
    x = 237.55

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.