Home / 61,212-129,105

Finding the Third Proportional to 61,212 and 129,105

Calculator

Solution

The third proportional to 61,212 and 129,105 is: 272,301.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,212 : 129,105 = 129,105 : x
  2. Step 2: Convert to fraction form
    61,212/129,105 = 129,105/x
  3. Step 3: Cross multiply
    61,212x = 129,105 × 129,105
  4. Step 4: Simplify right side
    61,212x = 16,668,101,025
  5. Step 5: Solve for x
    x = 16,668,101,025/61,212
  6. Step 6: Final answer
    x = 272,301.20

Related Problems

Find third proportional to 30,606 and 64,552.50
Half scale
Find third proportional to 122,424 and 258,210
Double scale
Find third proportional to 61,214 and 129,109
Similar ratio
Find third proportional to 91,818 and 193,657.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.