Home / 138,880-207,407

Finding the Third Proportional to 138,880 and 207,407

Calculator

Solution

The third proportional to 138,880 and 207,407 is: 309,747.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,880 : 207,407 = 207,407 : x
  2. Step 2: Convert to fraction form
    138,880/207,407 = 207,407/x
  3. Step 3: Cross multiply
    138,880x = 207,407 × 207,407
  4. Step 4: Simplify right side
    138,880x = 43,017,663,649
  5. Step 5: Solve for x
    x = 43,017,663,649/138,880
  6. Step 6: Final answer
    x = 309,747.00

Related Problems

Find third proportional to 69,440 and 103,703.50
Half scale
Find third proportional to 277,760 and 414,814
Double scale
Find third proportional to 138,882 and 207,410
Similar ratio
Find third proportional to 208,320 and 311,110.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.