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Finding the Fourth Proportional to 55.68, 82.96 and 54.28

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Solution

The fourth proportional to 55.68, 82.96 and 54.28 is: 80.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.68 : 82.96 = 54.28 : x
  2. Step 2: Convert to fraction form
    55.68/82.96 = 54.28/x
  3. Step 3: Cross multiply
    55.68x = 82.96 × 54.28
  4. Step 4: Simplify right side
    55.68x = 4,503.07
  5. Step 5: Solve for x
    x = 4,503.07/55.68
  6. Step 6: Final answer
    x = 80.87

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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.