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Finding the Fourth Proportional to 103.08, 154.65 and 68.91

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Solution

The fourth proportional to 103.08, 154.65 and 68.91 is: 103.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.08 : 154.65 = 68.91 : x
  2. Step 2: Convert to fraction form
    103.08/154.65 = 68.91/x
  3. Step 3: Cross multiply
    103.08x = 154.65 × 68.91
  4. Step 4: Simplify right side
    103.08x = 10,656.93
  5. Step 5: Solve for x
    x = 10,656.93/103.08
  6. Step 6: Final answer
    x = 103.39

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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.