Finding the Fourth Proportional to 81,436.98, 122,710.26 and 66,969.99
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Solution
The fourth proportional to 81,436.98, 122,710.26 and 66,969.99 is: 100,911.22
Step by Step Solution
- Step 1: Write the proportion equation
81,436.98 : 122,710.26 = 66,969.99 : x - Step 2: Convert to fraction form
81,436.98/122,710.26 = 66,969.99/x - Step 3: Cross multiply
81,436.98x = 122,710.26 × 66,969.99 - Step 4: Simplify right side
81,436.98x = 8,217,904,885.10 - Step 5: Solve for x
x = 8,217,904,885.10/81,436.98 - Step 6: Final answer
x = 100,911.22
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.