Finding the Fourth Proportional to 130,729.97, 180,403.85 and 74,140.13
Calculator
Solution
The fourth proportional to 130,729.97, 180,403.85 and 74,140.13 is: 102,311.39
Step by Step Solution
- Step 1: Write the proportion equation
130,729.97 : 180,403.85 = 74,140.13 : x - Step 2: Convert to fraction form
130,729.97/180,403.85 = 74,140.13/x - Step 3: Cross multiply
130,729.97x = 180,403.85 × 74,140.13 - Step 4: Simplify right side
130,729.97x = 13,375,163,989.48 - Step 5: Solve for x
x = 13,375,163,989.48/130,729.97 - Step 6: Final answer
x = 102,311.39
Related Problems
Find fourth proportional to 65,364.98, 90,201.93 and 37,070.06
Half scale
Find fourth proportional to 261,459.93, 360,807.70 and 148,280.25
Double scale
Find fourth proportional to 130,730.97, 180,405.23 and 74,141.13
Similar ratio
Find fourth proportional to 196,094.95, 270,605.78 and 111,210.19
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.