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Finding the Third Proportional to 90,571.50 and 198,639

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Solution

The third proportional to 90,571.50 and 198,639 is: 435,649.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,571.50 : 198,639 = 198,639 : x
  2. Step 2: Convert to fraction form
    90,571.50/198,639 = 198,639/x
  3. Step 3: Cross multiply
    90,571.50x = 198,639 × 198,639
  4. Step 4: Simplify right side
    90,571.50x = 39,457,452,321
  5. Step 5: Solve for x
    x = 39,457,452,321/90,571.50
  6. Step 6: Final answer
    x = 435,649.76

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.