Finding the Fourth Proportional to 86,910.80, 130,135.80 and 68,478.80
Calculator
Solution
The fourth proportional to 86,910.80, 130,135.80 and 68,478.80 is: 102,536.66
Step by Step Solution
- Step 1: Write the proportion equation
86,910.80 : 130,135.80 = 68,478.80 : x - Step 2: Convert to fraction form
86,910.80/130,135.80 = 68,478.80/x - Step 3: Cross multiply
86,910.80x = 130,135.80 × 68,478.80 - Step 4: Simplify right side
86,910.80x = 8,911,543,421.04 - Step 5: Solve for x
x = 8,911,543,421.04/86,910.80 - Step 6: Final answer
x = 102,536.66
Related Problems
Find fourth proportional to 43,455.40, 65,067.90 and 34,239.40
Half scale
Find fourth proportional to 173,821.60, 260,271.60 and 136,957.60
Double scale
Find fourth proportional to 86,911.80, 130,137.30 and 68,479.80
Similar ratio
Find fourth proportional to 130,366.20, 195,203.70 and 102,718.20
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.