Finding the Fourth Proportional to 149,405.09, 206,172.99 and 81,420.62
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Solution
The fourth proportional to 149,405.09, 206,172.99 and 81,420.62 is: 112,357.16
Step by Step Solution
- Step 1: Write the proportion equation
149,405.09 : 206,172.99 = 81,420.62 : x - Step 2: Convert to fraction form
149,405.09/206,172.99 = 81,420.62/x - Step 3: Cross multiply
149,405.09x = 206,172.99 × 81,420.62 - Step 4: Simplify right side
149,405.09x = 16,786,731,642.19 - Step 5: Solve for x
x = 16,786,731,642.19/149,405.09 - Step 6: Final answer
x = 112,357.16
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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.