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Finding the Fourth Proportional to 170.89, 256.12 and 73.36

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Solution

The fourth proportional to 170.89, 256.12 and 73.36 is: 109.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.89 : 256.12 = 73.36 : x
  2. Step 2: Convert to fraction form
    170.89/256.12 = 73.36/x
  3. Step 3: Cross multiply
    170.89x = 256.12 × 73.36
  4. Step 4: Simplify right side
    170.89x = 18,788.96
  5. Step 5: Solve for x
    x = 18,788.96/170.89
  6. Step 6: Final answer
    x = 109.95

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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.