Finding the Fourth Proportional to 86,428.53, 129,642.77 and 20,764.53
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Solution
The fourth proportional to 86,428.53, 129,642.77 and 20,764.53 is: 31,146.79
Step by Step Solution
- Step 1: Write the proportion equation
86,428.53 : 129,642.77 = 20,764.53 : x - Step 2: Convert to fraction form
86,428.53/129,642.77 = 20,764.53/x - Step 3: Cross multiply
86,428.53x = 129,642.77 × 20,764.53 - Step 4: Simplify right side
86,428.53x = 2,691,971,083.13 - Step 5: Solve for x
x = 2,691,971,083.13/86,428.53 - Step 6: Final answer
x = 31,146.79
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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.