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Finding the Third Proportional to 4,072,978.69 and 8,791,998.19

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Solution

The third proportional to 4,072,978.69 and 8,791,998.19 is: 18,978,550.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,072,978.69 : 8,791,998.19 = 8,791,998.19 : x
  2. Step 2: Convert to fraction form
    4,072,978.69/8,791,998.19 = 8,791,998.19/x
  3. Step 3: Cross multiply
    4,072,978.69x = 8,791,998.19 × 8,791,998.19
  4. Step 4: Simplify right side
    4,072,978.69x = 77,299,232,129,003.28
  5. Step 5: Solve for x
    x = 77,299,232,129,003.28/4,072,978.69
  6. Step 6: Final answer
    x = 18,978,550.60

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.