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Finding the Third Proportional to 99,403.50 and 213,639

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Solution

The third proportional to 99,403.50 and 213,639 is: 459,155.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,403.50 : 213,639 = 213,639 : x
  2. Step 2: Convert to fraction form
    99,403.50/213,639 = 213,639/x
  3. Step 3: Cross multiply
    99,403.50x = 213,639 × 213,639
  4. Step 4: Simplify right side
    99,403.50x = 45,641,622,321
  5. Step 5: Solve for x
    x = 45,641,622,321/99,403.50
  6. Step 6: Final answer
    x = 459,155.08

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.