Finding the Fourth Proportional to 231,998.48, 320,138.36 and 128,635.44
Calculator
Solution
The fourth proportional to 231,998.48, 320,138.36 and 128,635.44 is: 177,506.07
Step by Step Solution
- Step 1: Write the proportion equation
231,998.48 : 320,138.36 = 128,635.44 : x - Step 2: Convert to fraction form
231,998.48/320,138.36 = 128,635.44/x - Step 3: Cross multiply
231,998.48x = 320,138.36 × 128,635.44 - Step 4: Simplify right side
231,998.48x = 41,181,138,799.48 - Step 5: Solve for x
x = 41,181,138,799.48/231,998.48 - Step 6: Final answer
x = 177,506.07
Related Problems
Find fourth proportional to 115,999.24, 160,069.18 and 64,317.72
Half scale
Find fourth proportional to 463,996.96, 640,276.72 and 257,270.88
Double scale
Find fourth proportional to 231,999.48, 320,139.74 and 128,636.44
Similar ratio
Find fourth proportional to 347,997.72, 480,207.54 and 192,953.16
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.