Home / 68,218-139,817

Finding the Third Proportional to 68,218 and 139,817

Calculator

Solution

The third proportional to 68,218 and 139,817 is: 286,563.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,218 : 139,817 = 139,817 : x
  2. Step 2: Convert to fraction form
    68,218/139,817 = 139,817/x
  3. Step 3: Cross multiply
    68,218x = 139,817 × 139,817
  4. Step 4: Simplify right side
    68,218x = 19,548,793,489
  5. Step 5: Solve for x
    x = 19,548,793,489/68,218
  6. Step 6: Final answer
    x = 286,563.57

Related Problems

Find third proportional to 34,109 and 69,908.50
Half scale
Find third proportional to 136,436 and 279,634
Double scale
Find third proportional to 68,220 and 139,821
Similar ratio
Find third proportional to 102,327 and 209,725.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.