Finding the Fourth Proportional to 78,749.74, 117,993.11 and 55,334.26
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Solution
The fourth proportional to 78,749.74, 117,993.11 and 55,334.26 is: 82,908.99
Step by Step Solution
- Step 1: Write the proportion equation
78,749.74 : 117,993.11 = 55,334.26 : x - Step 2: Convert to fraction form
78,749.74/117,993.11 = 55,334.26/x - Step 3: Cross multiply
78,749.74x = 117,993.11 × 55,334.26 - Step 4: Simplify right side
78,749.74x = 6,529,061,426.95 - Step 5: Solve for x
x = 6,529,061,426.95/78,749.74 - Step 6: Final answer
x = 82,908.99
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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.