Finding the Fourth Proportional to 121,991,986.88, 168,351,867 and 66,239,756.96
Calculator
Solution
The fourth proportional to 121,991,986.88, 168,351,867 and 66,239,756.96 is: 91,412,452.89
Step by Step Solution
- Step 1: Write the proportion equation
121,991,986.88 : 168,351,867 = 66,239,756.96 : x - Step 2: Convert to fraction form
121,991,986.88/168,351,867 = 66,239,756.96/x - Step 3: Cross multiply
121,991,986.88x = 168,351,867 × 66,239,756.96 - Step 4: Simplify right side
121,991,986.88x = 11,151,586,753,842,244 - Step 5: Solve for x
x = 11,151,586,753,842,244/121,991,986.88 - Step 6: Final answer
x = 91,412,452.89
Related Problems
Find fourth proportional to 60,995,993.44, 84,175,933.50 and 33,119,878.48
Half scale
Find fourth proportional to 243,983,973.76, 336,703,734 and 132,479,513.92
Double scale
Find fourth proportional to 121,991,987.88, 168,351,868.38 and 66,239,757.96
Similar ratio
Find fourth proportional to 182,987,980.32, 252,527,800.50 and 99,359,635.44
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.