Finding the Fourth Proportional to 81,919.24, 122,908.45 and 28,619.09
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Solution
The fourth proportional to 81,919.24, 122,908.45 and 28,619.09 is: 42,938.96
Step by Step Solution
- Step 1: Write the proportion equation
81,919.24 : 122,908.45 = 28,619.09 : x - Step 2: Convert to fraction form
81,919.24/122,908.45 = 28,619.09/x - Step 3: Cross multiply
81,919.24x = 122,908.45 × 28,619.09 - Step 4: Simplify right side
81,919.24x = 3,517,527,234.67 - Step 5: Solve for x
x = 3,517,527,234.67/81,919.24 - Step 6: Final answer
x = 42,938.96
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1.5x scale
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.