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Finding the Fourth Proportional to 169.49, 253.90 and 100.71

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Solution

The fourth proportional to 169.49, 253.90 and 100.71 is: 150.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.49 : 253.90 = 100.71 : x
  2. Step 2: Convert to fraction form
    169.49/253.90 = 100.71/x
  3. Step 3: Cross multiply
    169.49x = 253.90 × 100.71
  4. Step 4: Simplify right side
    169.49x = 25,570.39
  5. Step 5: Solve for x
    x = 25,570.39/169.49
  6. Step 6: Final answer
    x = 150.86

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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.