Finding the Fourth Proportional to 75,719.68, 113,571.84 and 20,321.28
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Solution
The fourth proportional to 75,719.68, 113,571.84 and 20,321.28 is: 30,479.86
Step by Step Solution
- Step 1: Write the proportion equation
75,719.68 : 113,571.84 = 20,321.28 : x - Step 2: Convert to fraction form
75,719.68/113,571.84 = 20,321.28/x - Step 3: Cross multiply
75,719.68x = 113,571.84 × 20,321.28 - Step 4: Simplify right side
75,719.68x = 2,307,925,160.76 - Step 5: Solve for x
x = 2,307,925,160.76/75,719.68 - Step 6: Final answer
x = 30,479.86
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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.