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Finding the Fourth Proportional to 58.05, 80.46 and 54.68

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Solution

The fourth proportional to 58.05, 80.46 and 54.68 is: 75.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.05 : 80.46 = 54.68 : x
  2. Step 2: Convert to fraction form
    58.05/80.46 = 54.68/x
  3. Step 3: Cross multiply
    58.05x = 80.46 × 54.68
  4. Step 4: Simplify right side
    58.05x = 4,399.15
  5. Step 5: Solve for x
    x = 4,399.15/58.05
  6. Step 6: Final answer
    x = 75.78

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.