Home / 136,439-279,640

Finding the Third Proportional to 136,439 and 279,640

Calculator

Solution

The third proportional to 136,439 and 279,640 is: 573,139.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,439 : 279,640 = 279,640 : x
  2. Step 2: Convert to fraction form
    136,439/279,640 = 279,640/x
  3. Step 3: Cross multiply
    136,439x = 279,640 × 279,640
  4. Step 4: Simplify right side
    136,439x = 78,198,529,600
  5. Step 5: Solve for x
    x = 78,198,529,600/136,439
  6. Step 6: Final answer
    x = 573,139.13

Related Problems

Find third proportional to 68,219.50 and 139,820
Half scale
Find third proportional to 272,878 and 559,280
Double scale
Find third proportional to 136,441 and 279,644
Similar ratio
Find third proportional to 204,658.50 and 419,460
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.