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Finding the Fourth Proportional to 106.08, 158.04 and 103.20

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Solution

The fourth proportional to 106.08, 158.04 and 103.20 is: 153.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.08 : 158.04 = 103.20 : x
  2. Step 2: Convert to fraction form
    106.08/158.04 = 103.20/x
  3. Step 3: Cross multiply
    106.08x = 158.04 × 103.20
  4. Step 4: Simplify right side
    106.08x = 16,309.73
  5. Step 5: Solve for x
    x = 16,309.73/106.08
  6. Step 6: Final answer
    x = 153.75

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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.