Finding the Fourth Proportional to 81,478.27, 122,243.99 and 39,363.18
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Solution
The fourth proportional to 81,478.27, 122,243.99 and 39,363.18 is: 59,057.62
Step by Step Solution
- Step 1: Write the proportion equation
81,478.27 : 122,243.99 = 39,363.18 : x - Step 2: Convert to fraction form
81,478.27/122,243.99 = 39,363.18/x - Step 3: Cross multiply
81,478.27x = 122,243.99 × 39,363.18 - Step 4: Simplify right side
81,478.27x = 4,811,912,210.30 - Step 5: Solve for x
x = 4,811,912,210.30/81,478.27 - Step 6: Final answer
x = 59,057.62
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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.