Home / 128,006-172,320

Finding the Third Proportional to 128,006 and 172,320

Calculator

Solution

The third proportional to 128,006 and 172,320 is: 231,974.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,006 : 172,320 = 172,320 : x
  2. Step 2: Convert to fraction form
    128,006/172,320 = 172,320/x
  3. Step 3: Cross multiply
    128,006x = 172,320 × 172,320
  4. Step 4: Simplify right side
    128,006x = 29,694,182,400
  5. Step 5: Solve for x
    x = 29,694,182,400/128,006
  6. Step 6: Final answer
    x = 231,974.93

Related Problems

Find third proportional to 64,003 and 86,160
Half scale
Find third proportional to 256,012 and 344,640
Double scale
Find third proportional to 128,008 and 172,323
Similar ratio
Find third proportional to 192,009 and 258,480
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.