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Finding the Fourth Proportional to 172.75, 259.20 and 64.52

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Solution

The fourth proportional to 172.75, 259.20 and 64.52 is: 96.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.75 : 259.20 = 64.52 : x
  2. Step 2: Convert to fraction form
    172.75/259.20 = 64.52/x
  3. Step 3: Cross multiply
    172.75x = 259.20 × 64.52
  4. Step 4: Simplify right side
    172.75x = 16,723.58
  5. Step 5: Solve for x
    x = 16,723.58/172.75
  6. Step 6: Final answer
    x = 96.81

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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.