Home / 138,620-208,916

Finding the Third Proportional to 138,620 and 208,916

Calculator

Solution

The third proportional to 138,620 and 208,916 is: 314,860.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,620 : 208,916 = 208,916 : x
  2. Step 2: Convert to fraction form
    138,620/208,916 = 208,916/x
  3. Step 3: Cross multiply
    138,620x = 208,916 × 208,916
  4. Step 4: Simplify right side
    138,620x = 43,645,895,056
  5. Step 5: Solve for x
    x = 43,645,895,056/138,620
  6. Step 6: Final answer
    x = 314,860.01

Related Problems

Find third proportional to 69,310 and 104,458
Half scale
Find third proportional to 277,240 and 417,832
Double scale
Find third proportional to 138,622 and 208,919
Similar ratio
Find third proportional to 207,930 and 313,374
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.