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Finding the Fourth Proportional to 103.36, 154.96 and 45.56

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Solution

The fourth proportional to 103.36, 154.96 and 45.56 is: 68.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.36 : 154.96 = 45.56 : x
  2. Step 2: Convert to fraction form
    103.36/154.96 = 45.56/x
  3. Step 3: Cross multiply
    103.36x = 154.96 × 45.56
  4. Step 4: Simplify right side
    103.36x = 7,059.98
  5. Step 5: Solve for x
    x = 7,059.98/103.36
  6. Step 6: Final answer
    x = 68.30

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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.