Finding the Fourth Proportional to 81,129.42, 121,705.66 and 24,974.20
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Solution
The fourth proportional to 81,129.42, 121,705.66 and 24,974.20 is: 37,464.85
Step by Step Solution
- Step 1: Write the proportion equation
81,129.42 : 121,705.66 = 24,974.20 : x - Step 2: Convert to fraction form
81,129.42/121,705.66 = 24,974.20/x - Step 3: Cross multiply
81,129.42x = 121,705.66 × 24,974.20 - Step 4: Simplify right side
81,129.42x = 3,039,501,493.97 - Step 5: Solve for x
x = 3,039,501,493.97/81,129.42 - Step 6: Final answer
x = 37,464.85
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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.