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Finding the Fourth Proportional to 82.78, 124.04 and 41.63

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Solution

The fourth proportional to 82.78, 124.04 and 41.63 is: 62.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.78 : 124.04 = 41.63 : x
  2. Step 2: Convert to fraction form
    82.78/124.04 = 41.63/x
  3. Step 3: Cross multiply
    82.78x = 124.04 × 41.63
  4. Step 4: Simplify right side
    82.78x = 5,163.27
  5. Step 5: Solve for x
    x = 5,163.27/82.78
  6. Step 6: Final answer
    x = 62.38

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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.