Finding the Fourth Proportional to 139,542.21, 192,562.38 and 79,116.92
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Solution
The fourth proportional to 139,542.21, 192,562.38 and 79,116.92 is: 109,178.02
Step by Step Solution
- Step 1: Write the proportion equation
139,542.21 : 192,562.38 = 79,116.92 : x - Step 2: Convert to fraction form
139,542.21/192,562.38 = 79,116.92/x - Step 3: Cross multiply
139,542.21x = 192,562.38 × 79,116.92 - Step 4: Simplify right side
139,542.21x = 15,234,942,172.77 - Step 5: Solve for x
x = 15,234,942,172.77/139,542.21 - Step 6: Final answer
x = 109,178.02
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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.