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Finding the Fourth Proportional to 55.72, 84.07 and 53.08

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Solution

The fourth proportional to 55.72, 84.07 and 53.08 is: 80.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.72 : 84.07 = 53.08 : x
  2. Step 2: Convert to fraction form
    55.72/84.07 = 53.08/x
  3. Step 3: Cross multiply
    55.72x = 84.07 × 53.08
  4. Step 4: Simplify right side
    55.72x = 4,462.44
  5. Step 5: Solve for x
    x = 4,462.44/55.72
  6. Step 6: Final answer
    x = 80.09

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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.