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Finding the Third Proportional to 21,163.78 and 40,915.13

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Solution

The third proportional to 21,163.78 and 40,915.13 is: 79,099.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,163.78 : 40,915.13 = 40,915.13 : x
  2. Step 2: Convert to fraction form
    21,163.78/40,915.13 = 40,915.13/x
  3. Step 3: Cross multiply
    21,163.78x = 40,915.13 × 40,915.13
  4. Step 4: Simplify right side
    21,163.78x = 1,674,047,453.77
  5. Step 5: Solve for x
    x = 1,674,047,453.77/21,163.78
  6. Step 6: Final answer
    x = 79,099.64

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Why These Related Problems?

These problems maintain the same ratio (1.93) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.