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Finding the Fourth Proportional to 55.56, 83.36 and 27.78

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Solution

The fourth proportional to 55.56, 83.36 and 27.78 is: 41.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.56 : 83.36 = 27.78 : x
  2. Step 2: Convert to fraction form
    55.56/83.36 = 27.78/x
  3. Step 3: Cross multiply
    55.56x = 83.36 × 27.78
  4. Step 4: Simplify right side
    55.56x = 2,316.02
  5. Step 5: Solve for x
    x = 2,316.02/55.56
  6. Step 6: Final answer
    x = 41.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.