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Finding the Fourth Proportional to 69.61, 104.38 and 29.06

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Solution

The fourth proportional to 69.61, 104.38 and 29.06 is: 43.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.61 : 104.38 = 29.06 : x
  2. Step 2: Convert to fraction form
    69.61/104.38 = 29.06/x
  3. Step 3: Cross multiply
    69.61x = 104.38 × 29.06
  4. Step 4: Simplify right side
    69.61x = 3,033.28
  5. Step 5: Solve for x
    x = 3,033.28/69.61
  6. Step 6: Final answer
    x = 43.58

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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.