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Finding the Fourth Proportional to 169.70, 253.40 and 137.22

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Solution

The fourth proportional to 169.70, 253.40 and 137.22 is: 204.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.70 : 253.40 = 137.22 : x
  2. Step 2: Convert to fraction form
    169.70/253.40 = 137.22/x
  3. Step 3: Cross multiply
    169.70x = 253.40 × 137.22
  4. Step 4: Simplify right side
    169.70x = 34,771.55
  5. Step 5: Solve for x
    x = 34,771.55/169.70
  6. Step 6: Final answer
    x = 204.90

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.