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Finding the Fourth Proportional to 69.00, 103.40 and 61.41

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Solution

The fourth proportional to 69.00, 103.40 and 61.41 is: 92.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.00 : 103.40 = 61.41 : x
  2. Step 2: Convert to fraction form
    69.00/103.40 = 61.41/x
  3. Step 3: Cross multiply
    69.00x = 103.40 × 61.41
  4. Step 4: Simplify right side
    69.00x = 6,349.70
  5. Step 5: Solve for x
    x = 6,349.70/69.00
  6. Step 6: Final answer
    x = 92.02

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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.