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Finding the Third Proportional to 90,912,786 and 198,831,360

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Solution

The third proportional to 90,912,786 and 198,831,360 is: 434,855,331.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,912,786 : 198,831,360 = 198,831,360 : x
  2. Step 2: Convert to fraction form
    90,912,786/198,831,360 = 198,831,360/x
  3. Step 3: Cross multiply
    90,912,786x = 198,831,360 × 198,831,360
  4. Step 4: Simplify right side
    90,912,786x = 39,533,909,719,449,600
  5. Step 5: Solve for x
    x = 39,533,909,719,449,600/90,912,786
  6. Step 6: Final answer
    x = 434,855,331.78

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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.