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Finding the Fourth Proportional to 55.73, 84.06 and 53.91

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Solution

The fourth proportional to 55.73, 84.06 and 53.91 is: 81.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.73 : 84.06 = 53.91 : x
  2. Step 2: Convert to fraction form
    55.73/84.06 = 53.91/x
  3. Step 3: Cross multiply
    55.73x = 84.06 × 53.91
  4. Step 4: Simplify right side
    55.73x = 4,531.67
  5. Step 5: Solve for x
    x = 4,531.67/55.73
  6. Step 6: Final answer
    x = 81.31

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.