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Finding the Fourth Proportional to 55.81, 83.26 and 53.79

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Solution

The fourth proportional to 55.81, 83.26 and 53.79 is: 80.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.81 : 83.26 = 53.79 : x
  2. Step 2: Convert to fraction form
    55.81/83.26 = 53.79/x
  3. Step 3: Cross multiply
    55.81x = 83.26 × 53.79
  4. Step 4: Simplify right side
    55.81x = 4,478.56
  5. Step 5: Solve for x
    x = 4,478.56/55.81
  6. Step 6: Final answer
    x = 80.25

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.