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Finding the Fourth Proportional to 56.97, 84.87 and 54.51

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Solution

The fourth proportional to 56.97, 84.87 and 54.51 is: 81.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.97 : 84.87 = 54.51 : x
  2. Step 2: Convert to fraction form
    56.97/84.87 = 54.51/x
  3. Step 3: Cross multiply
    56.97x = 84.87 × 54.51
  4. Step 4: Simplify right side
    56.97x = 4,626.26
  5. Step 5: Solve for x
    x = 4,626.26/56.97
  6. Step 6: Final answer
    x = 81.21

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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.