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Finding the Fourth Proportional to 107.43, 160.40 and 92.21

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Solution

The fourth proportional to 107.43, 160.40 and 92.21 is: 137.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.43 : 160.40 = 92.21 : x
  2. Step 2: Convert to fraction form
    107.43/160.40 = 92.21/x
  3. Step 3: Cross multiply
    107.43x = 160.40 × 92.21
  4. Step 4: Simplify right side
    107.43x = 14,789.22
  5. Step 5: Solve for x
    x = 14,789.22/107.43
  6. Step 6: Final answer
    x = 137.66

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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.