Finding the Fourth Proportional to 78,387.40, 117,601.35 and 34,003.99
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Solution
The fourth proportional to 78,387.40, 117,601.35 and 34,003.99 is: 51,014.77
Step by Step Solution
- Step 1: Write the proportion equation
78,387.40 : 117,601.35 = 34,003.99 : x - Step 2: Convert to fraction form
78,387.40/117,601.35 = 34,003.99/x - Step 3: Cross multiply
78,387.40x = 117,601.35 × 34,003.99 - Step 4: Simplify right side
78,387.40x = 3,998,915,129.39 - Step 5: Solve for x
x = 3,998,915,129.39/78,387.40 - Step 6: Final answer
x = 51,014.77
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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.