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Finding the Third Proportional to 30,672,690 and 66,128,346

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Solution

The third proportional to 30,672,690 and 66,128,346 is: 142,568,458.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,672,690 : 66,128,346 = 66,128,346 : x
  2. Step 2: Convert to fraction form
    30,672,690/66,128,346 = 66,128,346/x
  3. Step 3: Cross multiply
    30,672,690x = 66,128,346 × 66,128,346
  4. Step 4: Simplify right side
    30,672,690x = 4,372,958,144,695,716
  5. Step 5: Solve for x
    x = 4,372,958,144,695,716/30,672,690
  6. Step 6: Final answer
    x = 142,568,458.94

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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.