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Finding the Fourth Proportional to 106.92, 159.48 and 103.55

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Solution

The fourth proportional to 106.92, 159.48 and 103.55 is: 154.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.92 : 159.48 = 103.55 : x
  2. Step 2: Convert to fraction form
    106.92/159.48 = 103.55/x
  3. Step 3: Cross multiply
    106.92x = 159.48 × 103.55
  4. Step 4: Simplify right side
    106.92x = 16,513.36
  5. Step 5: Solve for x
    x = 16,513.36/106.92
  6. Step 6: Final answer
    x = 154.45

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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.