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Finding the Fourth Proportional to 106.16, 158.88 and 103.76

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Solution

The fourth proportional to 106.16, 158.88 and 103.76 is: 155.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.16 : 158.88 = 103.76 : x
  2. Step 2: Convert to fraction form
    106.16/158.88 = 103.76/x
  3. Step 3: Cross multiply
    106.16x = 158.88 × 103.76
  4. Step 4: Simplify right side
    106.16x = 16,485.39
  5. Step 5: Solve for x
    x = 16,485.39/106.16
  6. Step 6: Final answer
    x = 155.29

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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.