Finding the Third Proportional to 138,421.72 and 216,858.99
Calculator
Solution
The third proportional to 138,421.72 and 216,858.99 is: 339,743.07
Step by Step Solution
- Step 1: Write the proportion equation
138,421.72 : 216,858.99 = 216,858.99 : x - Step 2: Convert to fraction form
138,421.72/216,858.99 = 216,858.99/x - Step 3: Cross multiply
138,421.72x = 216,858.99 × 216,858.99 - Step 4: Simplify right side
138,421.72x = 47,027,821,645.47 - Step 5: Solve for x
x = 47,027,821,645.47/138,421.72 - Step 6: Final answer
x = 339,743.07
Related Problems
Find third proportional to 69,210.86 and 108,429.50
Half scale
Find third proportional to 276,843.45 and 433,717.98
Double scale
Find third proportional to 138,424 and 216,862
Similar ratio
Find third proportional to 207,632.58 and 325,288.49
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.