Finding the Fourth Proportional to 75,639.70, 113,459.55 and 20,235.70
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Solution
The fourth proportional to 75,639.70, 113,459.55 and 20,235.70 is: 30,353.55
Step by Step Solution
- Step 1: Write the proportion equation
75,639.70 : 113,459.55 = 20,235.70 : x - Step 2: Convert to fraction form
75,639.70/113,459.55 = 20,235.70/x - Step 3: Cross multiply
75,639.70x = 113,459.55 × 20,235.70 - Step 4: Simplify right side
75,639.70x = 2,295,933,415.94 - Step 5: Solve for x
x = 2,295,933,415.94/75,639.70 - Step 6: Final answer
x = 30,353.55
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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.