Home / 139,290-212,201

Finding the Third Proportional to 139,290 and 212,201

Calculator

Solution

The third proportional to 139,290 and 212,201 is: 323,277.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,290 : 212,201 = 212,201 : x
  2. Step 2: Convert to fraction form
    139,290/212,201 = 212,201/x
  3. Step 3: Cross multiply
    139,290x = 212,201 × 212,201
  4. Step 4: Simplify right side
    139,290x = 45,029,264,401
  5. Step 5: Solve for x
    x = 45,029,264,401/139,290
  6. Step 6: Final answer
    x = 323,277.08

Related Problems

Find third proportional to 69,645 and 106,100.50
Half scale
Find third proportional to 278,580 and 424,402
Double scale
Find third proportional to 139,292 and 212,204
Similar ratio
Find third proportional to 208,935 and 318,301.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.