Finding the Fourth Proportional to 155,105.30, 213,990.79 and 101,421.74
Calculator
Solution
The fourth proportional to 155,105.30, 213,990.79 and 101,421.74 is: 139,926.35
Step by Step Solution
- Step 1: Write the proportion equation
155,105.30 : 213,990.79 = 101,421.74 : x - Step 2: Convert to fraction form
155,105.30/213,990.79 = 101,421.74/x - Step 3: Cross multiply
155,105.30x = 213,990.79 × 101,421.74 - Step 4: Simplify right side
155,105.30x = 21,703,318,265.77 - Step 5: Solve for x
x = 21,703,318,265.77/155,105.30 - Step 6: Final answer
x = 139,926.35
Related Problems
Find fourth proportional to 77,552.65, 106,995.40 and 50,710.87
Half scale
Find fourth proportional to 310,210.60, 427,981.58 and 202,843.48
Double scale
Find fourth proportional to 155,106.30, 213,992.17 and 101,422.74
Similar ratio
Find fourth proportional to 232,657.95, 320,986.19 and 152,132.61
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.