Home / 43,640-69,720

Finding the Third Proportional to 43,640 and 69,720

Calculator

Solution

The third proportional to 43,640 and 69,720 is: 111,385.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,640 : 69,720 = 69,720 : x
  2. Step 2: Convert to fraction form
    43,640/69,720 = 69,720/x
  3. Step 3: Cross multiply
    43,640x = 69,720 × 69,720
  4. Step 4: Simplify right side
    43,640x = 4,860,878,400
  5. Step 5: Solve for x
    x = 4,860,878,400/43,640
  6. Step 6: Final answer
    x = 111,385.85

Related Problems

Find third proportional to 21,820 and 34,860
Half scale
Find third proportional to 87,280 and 139,440
Double scale
Find third proportional to 43,642 and 69,723
Similar ratio
Find third proportional to 65,460 and 104,580
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.