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Finding the Fourth Proportional to 103.06, 141.41 and 100.48

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Solution

The fourth proportional to 103.06, 141.41 and 100.48 is: 137.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.06 : 141.41 = 100.48 : x
  2. Step 2: Convert to fraction form
    103.06/141.41 = 100.48/x
  3. Step 3: Cross multiply
    103.06x = 141.41 × 100.48
  4. Step 4: Simplify right side
    103.06x = 14,208.88
  5. Step 5: Solve for x
    x = 14,208.88/103.06
  6. Step 6: Final answer
    x = 137.87

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.