Finding the Fourth Proportional to 153,718, 212,134.08 and 86,650
Calculator
Solution
The fourth proportional to 153,718, 212,134.08 and 86,650 is: 119,578.83
Step by Step Solution
- Step 1: Write the proportion equation
153,718 : 212,134.08 = 86,650 : x - Step 2: Convert to fraction form
153,718/212,134.08 = 86,650/x - Step 3: Cross multiply
153,718x = 212,134.08 × 86,650 - Step 4: Simplify right side
153,718x = 18,381,418,032 - Step 5: Solve for x
x = 18,381,418,032/153,718 - Step 6: Final answer
x = 119,578.83
Related Problems
Find fourth proportional to 76,859, 106,067.04 and 43,325
Half scale
Find fourth proportional to 307,436, 424,268.16 and 173,300
Double scale
Find fourth proportional to 153,719, 212,135.46 and 86,651
Similar ratio
Find fourth proportional to 230,577, 318,201.12 and 129,975
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.