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Finding the Fourth Proportional to 106.03, 158.64 and 69.99

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Solution

The fourth proportional to 106.03, 158.64 and 69.99 is: 104.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.03 : 158.64 = 69.99 : x
  2. Step 2: Convert to fraction form
    106.03/158.64 = 69.99/x
  3. Step 3: Cross multiply
    106.03x = 158.64 × 69.99
  4. Step 4: Simplify right side
    106.03x = 11,103.21
  5. Step 5: Solve for x
    x = 11,103.21/106.03
  6. Step 6: Final answer
    x = 104.72

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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.