Home / 138,720-214,670

Finding the Third Proportional to 138,720 and 214,670

Calculator

Solution

The third proportional to 138,720 and 214,670 is: 332,203.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,720 : 214,670 = 214,670 : x
  2. Step 2: Convert to fraction form
    138,720/214,670 = 214,670/x
  3. Step 3: Cross multiply
    138,720x = 214,670 × 214,670
  4. Step 4: Simplify right side
    138,720x = 46,083,208,900
  5. Step 5: Solve for x
    x = 46,083,208,900/138,720
  6. Step 6: Final answer
    x = 332,203.06

Related Problems

Find third proportional to 69,360 and 107,335
Half scale
Find third proportional to 277,440 and 429,340
Double scale
Find third proportional to 138,722 and 214,673
Similar ratio
Find third proportional to 208,080 and 322,005
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.