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Finding the Fourth Proportional to 170.49, 255.67 and 72.93

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Solution

The fourth proportional to 170.49, 255.67 and 72.93 is: 109.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.49 : 255.67 = 72.93 : x
  2. Step 2: Convert to fraction form
    170.49/255.67 = 72.93/x
  3. Step 3: Cross multiply
    170.49x = 255.67 × 72.93
  4. Step 4: Simplify right side
    170.49x = 18,644.69
  5. Step 5: Solve for x
    x = 18,644.69/170.49
  6. Step 6: Final answer
    x = 109.36

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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.