Finding the Fourth Proportional to 212,138.12, 318,201.48 and 52,215.48
Calculator
Solution
The fourth proportional to 212,138.12, 318,201.48 and 52,215.48 is: 78,321.82
Step by Step Solution
- Step 1: Write the proportion equation
212,138.12 : 318,201.48 = 52,215.48 : x - Step 2: Convert to fraction form
212,138.12/318,201.48 = 52,215.48/x - Step 3: Cross multiply
212,138.12x = 318,201.48 × 52,215.48 - Step 4: Simplify right side
212,138.12x = 16,615,043,014.91 - Step 5: Solve for x
x = 16,615,043,014.91/212,138.12 - Step 6: Final answer
x = 78,321.82
Related Problems
Find fourth proportional to 106,069.06, 159,100.74 and 26,107.74
Half scale
Find fourth proportional to 424,276.24, 636,402.96 and 104,430.96
Double scale
Find fourth proportional to 212,139.12, 318,202.98 and 52,216.48
Similar ratio
Find fourth proportional to 318,207.18, 477,302.22 and 78,323.22
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.