Home / 139,459-210,497

Finding the Third Proportional to 139,459 and 210,497

Calculator

Solution

The third proportional to 139,459 and 210,497 is: 317,720.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,459 : 210,497 = 210,497 : x
  2. Step 2: Convert to fraction form
    139,459/210,497 = 210,497/x
  3. Step 3: Cross multiply
    139,459x = 210,497 × 210,497
  4. Step 4: Simplify right side
    139,459x = 44,308,987,009
  5. Step 5: Solve for x
    x = 44,308,987,009/139,459
  6. Step 6: Final answer
    x = 317,720.53

Related Problems

Find third proportional to 69,729.50 and 105,248.50
Half scale
Find third proportional to 278,918 and 420,994
Double scale
Find third proportional to 139,461 and 210,500
Similar ratio
Find third proportional to 209,188.50 and 315,745.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.