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Finding the Fourth Proportional to 170.02, 255.03 and 61.81

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Solution

The fourth proportional to 170.02, 255.03 and 61.81 is: 92.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.02 : 255.03 = 61.81 : x
  2. Step 2: Convert to fraction form
    170.02/255.03 = 61.81/x
  3. Step 3: Cross multiply
    170.02x = 255.03 × 61.81
  4. Step 4: Simplify right side
    170.02x = 15,763.40
  5. Step 5: Solve for x
    x = 15,763.40/170.02
  6. Step 6: Final answer
    x = 92.72

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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.