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Finding the Fourth Proportional to 71,104.95, 106,657.43 and 21,183.76

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Solution

The fourth proportional to 71,104.95, 106,657.43 and 21,183.76 is: 31,775.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,104.95 : 106,657.43 = 21,183.76 : x
  2. Step 2: Convert to fraction form
    71,104.95/106,657.43 = 21,183.76/x
  3. Step 3: Cross multiply
    71,104.95x = 106,657.43 × 21,183.76
  4. Step 4: Simplify right side
    71,104.95x = 2,259,405,399.34
  5. Step 5: Solve for x
    x = 2,259,405,399.34/71,104.95
  6. Step 6: Final answer
    x = 31,775.64

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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.