Finding the Fourth Proportional to 87,631.51, 120,789.80 and 68,478.00
Calculator
Solution
The fourth proportional to 87,631.51, 120,789.80 and 68,478.00 is: 94,388.92
Step by Step Solution
- Step 1: Write the proportion equation
87,631.51 : 120,789.80 = 68,478.00 : x - Step 2: Convert to fraction form
87,631.51/120,789.80 = 68,478.00/x - Step 3: Cross multiply
87,631.51x = 120,789.80 × 68,478.00 - Step 4: Simplify right side
87,631.51x = 8,271,443,320.45 - Step 5: Solve for x
x = 8,271,443,320.45/87,631.51 - Step 6: Final answer
x = 94,388.92
Related Problems
Find fourth proportional to 43,815.75, 60,394.90 and 34,239.00
Half scale
Find fourth proportional to 175,263.01, 241,579.60 and 136,955.99
Double scale
Find fourth proportional to 87,632.51, 120,791.18 and 68,479
Similar ratio
Find fourth proportional to 131,447.26, 181,184.70 and 102,716.99
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.