Home / 122,640-172,656

Finding the Third Proportional to 122,640 and 172,656

Calculator

Solution

The third proportional to 122,640 and 172,656 is: 243,069.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,640 : 172,656 = 172,656 : x
  2. Step 2: Convert to fraction form
    122,640/172,656 = 172,656/x
  3. Step 3: Cross multiply
    122,640x = 172,656 × 172,656
  4. Step 4: Simplify right side
    122,640x = 29,810,094,336
  5. Step 5: Solve for x
    x = 29,810,094,336/122,640
  6. Step 6: Final answer
    x = 243,069.91

Related Problems

Find third proportional to 61,320 and 86,328
Half scale
Find third proportional to 245,280 and 345,312
Double scale
Find third proportional to 122,642 and 172,659
Similar ratio
Find third proportional to 183,960 and 258,984
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.