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Finding the Third Proportional to 43,788 and 90,690

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Solution

The third proportional to 43,788 and 90,690 is: 187,829.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,788 : 90,690 = 90,690 : x
  2. Step 2: Convert to fraction form
    43,788/90,690 = 90,690/x
  3. Step 3: Cross multiply
    43,788x = 90,690 × 90,690
  4. Step 4: Simplify right side
    43,788x = 8,224,676,100
  5. Step 5: Solve for x
    x = 8,224,676,100/43,788
  6. Step 6: Final answer
    x = 187,829.45

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.