Home / 100,399-209,121

Finding the Third Proportional to 100,399 and 209,121

Calculator

Solution

The third proportional to 100,399 and 209,121 is: 435,577.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,399 : 209,121 = 209,121 : x
  2. Step 2: Convert to fraction form
    100,399/209,121 = 209,121/x
  3. Step 3: Cross multiply
    100,399x = 209,121 × 209,121
  4. Step 4: Simplify right side
    100,399x = 43,731,592,641
  5. Step 5: Solve for x
    x = 43,731,592,641/100,399
  6. Step 6: Final answer
    x = 435,577.97

Related Problems

Find third proportional to 50,199.50 and 104,560.50
Half scale
Find third proportional to 200,798 and 418,242
Double scale
Find third proportional to 100,401 and 209,125
Similar ratio
Find third proportional to 150,598.50 and 313,681.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.