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Finding the Fourth Proportional to 75.41, 103.97 and 55.76

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Solution

The fourth proportional to 75.41, 103.97 and 55.76 is: 76.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.41 : 103.97 = 55.76 : x
  2. Step 2: Convert to fraction form
    75.41/103.97 = 55.76/x
  3. Step 3: Cross multiply
    75.41x = 103.97 × 55.76
  4. Step 4: Simplify right side
    75.41x = 5,797.77
  5. Step 5: Solve for x
    x = 5,797.77/75.41
  6. Step 6: Final answer
    x = 76.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.