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Finding the Fourth Proportional to 103,611, 155,442.60 and 29,739

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Solution

The fourth proportional to 103,611, 155,442.60 and 29,739 is: 44,615.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,611 : 155,442.60 = 29,739 : x
  2. Step 2: Convert to fraction form
    103,611/155,442.60 = 29,739/x
  3. Step 3: Cross multiply
    103,611x = 155,442.60 × 29,739
  4. Step 4: Simplify right side
    103,611x = 4,622,707,481.40
  5. Step 5: Solve for x
    x = 4,622,707,481.40/103,611
  6. Step 6: Final answer
    x = 44,615.99

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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.