Finding the Fourth Proportional to 85,695.21, 128,989.71 and 77,544.99
Calculator
Solution
The fourth proportional to 85,695.21, 128,989.71 and 77,544.99 is: 116,721.88
Step by Step Solution
- Step 1: Write the proportion equation
85,695.21 : 128,989.71 = 77,544.99 : x - Step 2: Convert to fraction form
85,695.21/128,989.71 = 77,544.99/x - Step 3: Cross multiply
85,695.21x = 128,989.71 × 77,544.99 - Step 4: Simplify right side
85,695.21x = 10,002,505,772.05 - Step 5: Solve for x
x = 10,002,505,772.05/85,695.21 - Step 6: Final answer
x = 116,721.88
Related Problems
Find fourth proportional to 42,847.61, 64,494.86 and 38,772.50
Half scale
Find fourth proportional to 171,390.42, 257,979.42 and 155,089.98
Double scale
Find fourth proportional to 85,696.21, 128,991.22 and 77,545.99
Similar ratio
Find fourth proportional to 128,542.82, 193,484.57 and 116,317.49
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.