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Finding the Fourth Proportional to 169.70, 254.57 and 61.45

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Solution

The fourth proportional to 169.70, 254.57 and 61.45 is: 92.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.70 : 254.57 = 61.45 : x
  2. Step 2: Convert to fraction form
    169.70/254.57 = 61.45/x
  3. Step 3: Cross multiply
    169.70x = 254.57 × 61.45
  4. Step 4: Simplify right side
    169.70x = 15,642.38
  5. Step 5: Solve for x
    x = 15,642.38/169.70
  6. Step 6: Final answer
    x = 92.18

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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.