Finding the Fourth Proportional to 139,905.46, 193,069.20 and 76,243.09
Calculator
Solution
The fourth proportional to 139,905.46, 193,069.20 and 76,243.09 is: 105,215.28
Step by Step Solution
- Step 1: Write the proportion equation
139,905.46 : 193,069.20 = 76,243.09 : x - Step 2: Convert to fraction form
139,905.46/193,069.20 = 76,243.09/x - Step 3: Cross multiply
139,905.46x = 193,069.20 × 76,243.09 - Step 4: Simplify right side
139,905.46x = 14,720,192,391.83 - Step 5: Solve for x
x = 14,720,192,391.83/139,905.46 - Step 6: Final answer
x = 105,215.28
Related Problems
Find fourth proportional to 69,952.73, 96,534.60 and 38,121.55
Half scale
Find fourth proportional to 279,810.92, 386,138.40 and 152,486.18
Double scale
Find fourth proportional to 139,906.46, 193,070.58 and 76,244.09
Similar ratio
Find fourth proportional to 209,858.19, 289,603.80 and 114,364.64
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.