Finding the Fourth Proportional to 139,201.20, 208,801.80 and 103,771.80
Calculator
Solution
The fourth proportional to 139,201.20, 208,801.80 and 103,771.80 is: 155,657.70
Step by Step Solution
- Step 1: Write the proportion equation
139,201.20 : 208,801.80 = 103,771.80 : x - Step 2: Convert to fraction form
139,201.20/208,801.80 = 103,771.80/x - Step 3: Cross multiply
139,201.20x = 208,801.80 × 103,771.80 - Step 4: Simplify right side
139,201.20x = 21,667,738,629.24 - Step 5: Solve for x
x = 21,667,738,629.24/139,201.20 - Step 6: Final answer
x = 155,657.70
Related Problems
Find fourth proportional to 69,600.60, 104,400.90 and 51,885.90
Half scale
Find fourth proportional to 278,402.40, 417,603.60 and 207,543.60
Double scale
Find fourth proportional to 139,202.20, 208,803.30 and 103,772.80
Similar ratio
Find fourth proportional to 208,801.80, 313,202.70 and 155,657.70
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.