Finding the Fourth Proportional to 211,272.80, 316,909.20 and 86,703.20
Calculator
Solution
The fourth proportional to 211,272.80, 316,909.20 and 86,703.20 is: 130,054.80
Step by Step Solution
- Step 1: Write the proportion equation
211,272.80 : 316,909.20 = 86,703.20 : x - Step 2: Convert to fraction form
211,272.80/316,909.20 = 86,703.20/x - Step 3: Cross multiply
211,272.80x = 316,909.20 × 86,703.20 - Step 4: Simplify right side
211,272.80x = 27,477,041,749.44 - Step 5: Solve for x
x = 27,477,041,749.44/211,272.80 - Step 6: Final answer
x = 130,054.80
Related Problems
Find fourth proportional to 105,636.40, 158,454.60 and 43,351.60
Half scale
Find fourth proportional to 422,545.60, 633,818.40 and 173,406.40
Double scale
Find fourth proportional to 211,273.80, 316,910.70 and 86,704.20
Similar ratio
Find fourth proportional to 316,909.20, 475,363.80 and 130,054.80
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.