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Finding the Fourth Proportional to 107.44, 160.21 and 103.21

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Solution

The fourth proportional to 107.44, 160.21 and 103.21 is: 153.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.44 : 160.21 = 103.21 : x
  2. Step 2: Convert to fraction form
    107.44/160.21 = 103.21/x
  3. Step 3: Cross multiply
    107.44x = 160.21 × 103.21
  4. Step 4: Simplify right side
    107.44x = 16,535.27
  5. Step 5: Solve for x
    x = 16,535.27/107.44
  6. Step 6: Final answer
    x = 153.90

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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.