Home / 121,686-261,480

Finding the Third Proportional to 121,686 and 261,480

Calculator

Solution

The third proportional to 121,686 and 261,480 is: 561,870.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,686 : 261,480 = 261,480 : x
  2. Step 2: Convert to fraction form
    121,686/261,480 = 261,480/x
  3. Step 3: Cross multiply
    121,686x = 261,480 × 261,480
  4. Step 4: Simplify right side
    121,686x = 68,371,790,400
  5. Step 5: Solve for x
    x = 68,371,790,400/121,686
  6. Step 6: Final answer
    x = 561,870.64

Related Problems

Find third proportional to 60,843 and 130,740
Half scale
Find third proportional to 243,372 and 522,960
Double scale
Find third proportional to 121,688 and 261,484
Similar ratio
Find third proportional to 182,529 and 392,220
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.