Finding the Fourth Proportional to 139,670.63, 192,749.84 and 79,243.82
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Solution
The fourth proportional to 139,670.63, 192,749.84 and 79,243.82 is: 109,358.95
Step by Step Solution
- Step 1: Write the proportion equation
139,670.63 : 192,749.84 = 79,243.82 : x - Step 2: Convert to fraction form
139,670.63/192,749.84 = 79,243.82/x - Step 3: Cross multiply
139,670.63x = 192,749.84 × 79,243.82 - Step 4: Simplify right side
139,670.63x = 15,274,232,662.24 - Step 5: Solve for x
x = 15,274,232,662.24/139,670.63 - Step 6: Final answer
x = 109,358.95
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.