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Finding the Fourth Proportional to 146.69, 219.91 and 69.61

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Solution

The fourth proportional to 146.69, 219.91 and 69.61 is: 104.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.69 : 219.91 = 69.61 : x
  2. Step 2: Convert to fraction form
    146.69/219.91 = 69.61/x
  3. Step 3: Cross multiply
    146.69x = 219.91 × 69.61
  4. Step 4: Simplify right side
    146.69x = 15,307.94
  5. Step 5: Solve for x
    x = 15,307.94/146.69
  6. Step 6: Final answer
    x = 104.36

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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.