Finding the Fourth Proportional to 81,231.07, 121,874.27 and 43,794.74
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Solution
The fourth proportional to 81,231.07, 121,874.27 and 43,794.74 is: 65,707.03
Step by Step Solution
- Step 1: Write the proportion equation
81,231.07 : 121,874.27 = 43,794.74 : x - Step 2: Convert to fraction form
81,231.07/121,874.27 = 43,794.74/x - Step 3: Cross multiply
81,231.07x = 121,874.27 × 43,794.74 - Step 4: Simplify right side
81,231.07x = 5,337,452,299.40 - Step 5: Solve for x
x = 5,337,452,299.40/81,231.07 - Step 6: Final answer
x = 65,707.03
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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.