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Finding the Fourth Proportional to 55.86, 83.36 and 54.42

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Solution

The fourth proportional to 55.86, 83.36 and 54.42 is: 81.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.86 : 83.36 = 54.42 : x
  2. Step 2: Convert to fraction form
    55.86/83.36 = 54.42/x
  3. Step 3: Cross multiply
    55.86x = 83.36 × 54.42
  4. Step 4: Simplify right side
    55.86x = 4,536.03
  5. Step 5: Solve for x
    x = 4,536.03/55.86
  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.