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Finding the Fourth Proportional to 54.79, 75.54 and 49.39

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Solution

The fourth proportional to 54.79, 75.54 and 49.39 is: 68.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.79 : 75.54 = 49.39 : x
  2. Step 2: Convert to fraction form
    54.79/75.54 = 49.39/x
  3. Step 3: Cross multiply
    54.79x = 75.54 × 49.39
  4. Step 4: Simplify right side
    54.79x = 3,730.92
  5. Step 5: Solve for x
    x = 3,730.92/54.79
  6. Step 6: Final answer
    x = 68.09

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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.