Finding the Fourth Proportional to 75,491.20, 113,236.80 and 19,331.20
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Solution
The fourth proportional to 75,491.20, 113,236.80 and 19,331.20 is: 28,996.80
Step by Step Solution
- Step 1: Write the proportion equation
75,491.20 : 113,236.80 = 19,331.20 : x - Step 2: Convert to fraction form
75,491.20/113,236.80 = 19,331.20/x - Step 3: Cross multiply
75,491.20x = 113,236.80 × 19,331.20 - Step 4: Simplify right side
75,491.20x = 2,189,003,228.16 - Step 5: Solve for x
x = 2,189,003,228.16/75,491.20 - Step 6: Final answer
x = 28,996.80
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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.