Finding the Fourth Proportional to 140,704.36, 210,721.50 and 81,415.08
Calculator
Solution
The fourth proportional to 140,704.36, 210,721.50 and 81,415.08 is: 121,928.76
Step by Step Solution
- Step 1: Write the proportion equation
140,704.36 : 210,721.50 = 81,415.08 : x - Step 2: Convert to fraction form
140,704.36/210,721.50 = 81,415.08/x - Step 3: Cross multiply
140,704.36x = 210,721.50 × 81,415.08 - Step 4: Simplify right side
140,704.36x = 17,155,907,780.22 - Step 5: Solve for x
x = 17,155,907,780.22/140,704.36 - Step 6: Final answer
x = 121,928.76
Related Problems
Find fourth proportional to 70,352.18, 105,360.75 and 40,707.54
Half scale
Find fourth proportional to 281,408.72, 421,443 and 162,830.16
Double scale
Find fourth proportional to 140,705.36, 210,723 and 81,416.08
Similar ratio
Find fourth proportional to 211,056.54, 316,082.25 and 122,122.62
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.