Finding the Fourth Proportional to 213,687.12, 320,412.36 and 87,416.07
Calculator
Solution
The fourth proportional to 213,687.12, 320,412.36 and 87,416.07 is: 131,075.70
Step by Step Solution
- Step 1: Write the proportion equation
213,687.12 : 320,412.36 = 87,416.07 : x - Step 2: Convert to fraction form
213,687.12/320,412.36 = 87,416.07/x - Step 3: Cross multiply
213,687.12x = 320,412.36 × 87,416.07 - Step 4: Simplify right side
213,687.12x = 28,009,189,290.63 - Step 5: Solve for x
x = 28,009,189,290.63/213,687.12 - Step 6: Final answer
x = 131,075.70
Related Problems
Find fourth proportional to 106,843.56, 160,206.18 and 43,708.04
Half scale
Find fourth proportional to 427,374.24, 640,824.72 and 174,832.14
Double scale
Find fourth proportional to 213,688.12, 320,413.86 and 87,417.07
Similar ratio
Find fourth proportional to 320,530.68, 480,618.54 and 131,124.11
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.