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Finding the Fourth Proportional to 98.56, 147.82 and 55.27

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Solution

The fourth proportional to 98.56, 147.82 and 55.27 is: 82.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.56 : 147.82 = 55.27 : x
  2. Step 2: Convert to fraction form
    98.56/147.82 = 55.27/x
  3. Step 3: Cross multiply
    98.56x = 147.82 × 55.27
  4. Step 4: Simplify right side
    98.56x = 8,170.01
  5. Step 5: Solve for x
    x = 8,170.01/98.56
  6. Step 6: Final answer
    x = 82.89

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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.