Finding the Fourth Proportional to 129,313.28, 178,451.16 and 72,723.44
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Solution
The fourth proportional to 129,313.28, 178,451.16 and 72,723.44 is: 100,357.69
Step by Step Solution
- Step 1: Write the proportion equation
129,313.28 : 178,451.16 = 72,723.44 : x - Step 2: Convert to fraction form
129,313.28/178,451.16 = 72,723.44/x - Step 3: Cross multiply
129,313.28x = 178,451.16 × 72,723.44 - Step 4: Simplify right side
129,313.28x = 12,977,582,227.19 - Step 5: Solve for x
x = 12,977,582,227.19/129,313.28 - Step 6: Final answer
x = 100,357.69
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.