Finding the Fourth Proportional to 139,777.98, 192,891.70 and 79,348.09
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Solution
The fourth proportional to 139,777.98, 192,891.70 and 79,348.09 is: 109,499.28
Step by Step Solution
- Step 1: Write the proportion equation
139,777.98 : 192,891.70 = 79,348.09 : x - Step 2: Convert to fraction form
139,777.98/192,891.70 = 79,348.09/x - Step 3: Cross multiply
139,777.98x = 192,891.70 × 79,348.09 - Step 4: Simplify right side
139,777.98x = 15,305,587,971.85 - Step 5: Solve for x
x = 15,305,587,971.85/139,777.98 - Step 6: Final answer
x = 109,499.28
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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.