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Finding the Fourth Proportional to 40,729.20, 61,093.80 and 21,046.20

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Solution

The fourth proportional to 40,729.20, 61,093.80 and 21,046.20 is: 31,569.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,729.20 : 61,093.80 = 21,046.20 : x
  2. Step 2: Convert to fraction form
    40,729.20/61,093.80 = 21,046.20/x
  3. Step 3: Cross multiply
    40,729.20x = 61,093.80 × 21,046.20
  4. Step 4: Simplify right side
    40,729.20x = 1,285,792,333.56
  5. Step 5: Solve for x
    x = 1,285,792,333.56/40,729.20
  6. Step 6: Final answer
    x = 31,569.30

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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.