Finding the Fourth Proportional to 78,459.75, 117,741.47 and 36,909.99
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Solution
The fourth proportional to 78,459.75, 117,741.47 and 36,909.99 is: 55,389.37
Step by Step Solution
- Step 1: Write the proportion equation
78,459.75 : 117,741.47 = 36,909.99 : x - Step 2: Convert to fraction form
78,459.75/117,741.47 = 36,909.99/x - Step 3: Cross multiply
78,459.75x = 117,741.47 × 36,909.99 - Step 4: Simplify right side
78,459.75x = 4,345,836,295.74 - Step 5: Solve for x
x = 4,345,836,295.74/78,459.75 - Step 6: Final answer
x = 55,389.37
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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.