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Finding the Fourth Proportional to 69.55, 104.22 and 61.93

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Solution

The fourth proportional to 69.55, 104.22 and 61.93 is: 92.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.55 : 104.22 = 61.93 : x
  2. Step 2: Convert to fraction form
    69.55/104.22 = 61.93/x
  3. Step 3: Cross multiply
    69.55x = 104.22 × 61.93
  4. Step 4: Simplify right side
    69.55x = 6,454.34
  5. Step 5: Solve for x
    x = 6,454.34/69.55
  6. Step 6: Final answer
    x = 92.80

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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.