Finding the Fourth Proportional to 145,985.19, 201,459.01 and 78,917.19
Calculator
Solution
The fourth proportional to 145,985.19, 201,459.01 and 78,917.19 is: 108,905.42
Step by Step Solution
- Step 1: Write the proportion equation
145,985.19 : 201,459.01 = 78,917.19 : x - Step 2: Convert to fraction form
145,985.19/201,459.01 = 78,917.19/x - Step 3: Cross multiply
145,985.19x = 201,459.01 × 78,917.19 - Step 4: Simplify right side
145,985.19x = 15,898,578,969.38 - Step 5: Solve for x
x = 15,898,578,969.38/145,985.19 - Step 6: Final answer
x = 108,905.42
Related Problems
Find fourth proportional to 72,992.60, 100,729.51 and 39,458.60
Half scale
Find fourth proportional to 291,970.38, 402,918.02 and 157,834.38
Double scale
Find fourth proportional to 145,986.19, 201,460.39 and 78,918.19
Similar ratio
Find fourth proportional to 218,977.79, 302,188.52 and 118,375.79
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.