Home / 99,720-218,212

Finding the Third Proportional to 99,720 and 218,212

Calculator

Solution

The third proportional to 99,720 and 218,212 is: 477,501.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,720 : 218,212 = 218,212 : x
  2. Step 2: Convert to fraction form
    99,720/218,212 = 218,212/x
  3. Step 3: Cross multiply
    99,720x = 218,212 × 218,212
  4. Step 4: Simplify right side
    99,720x = 47,616,476,944
  5. Step 5: Solve for x
    x = 47,616,476,944/99,720
  6. Step 6: Final answer
    x = 477,501.77

Related Problems

Find third proportional to 49,860 and 109,106
Half scale
Find third proportional to 199,440 and 436,424
Double scale
Find third proportional to 99,722 and 218,216
Similar ratio
Find third proportional to 149,580 and 327,318
1.5x scale

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.