Home / 129,078-279,603

Finding the Third Proportional to 129,078 and 279,603

Calculator

Solution

The third proportional to 129,078 and 279,603 is: 605,663.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,078 : 279,603 = 279,603 : x
  2. Step 2: Convert to fraction form
    129,078/279,603 = 279,603/x
  3. Step 3: Cross multiply
    129,078x = 279,603 × 279,603
  4. Step 4: Simplify right side
    129,078x = 78,177,837,609
  5. Step 5: Solve for x
    x = 78,177,837,609/129,078
  6. Step 6: Final answer
    x = 605,663.53

Related Problems

Find third proportional to 64,539 and 139,801.50
Half scale
Find third proportional to 258,156 and 559,206
Double scale
Find third proportional to 129,080 and 279,607
Similar ratio
Find third proportional to 193,617 and 419,404.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.