Finding the Fourth Proportional to 139,559.38, 192,635.84 and 79,170.18
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Solution
The fourth proportional to 139,559.38, 192,635.84 and 79,170.18 is: 109,279.75
Step by Step Solution
- Step 1: Write the proportion equation
139,559.38 : 192,635.84 = 79,170.18 : x - Step 2: Convert to fraction form
139,559.38/192,635.84 = 79,170.18/x - Step 3: Cross multiply
139,559.38x = 192,635.84 × 79,170.18 - Step 4: Simplify right side
139,559.38x = 15,251,014,127.25 - Step 5: Solve for x
x = 15,251,014,127.25/139,559.38 - Step 6: Final answer
x = 109,279.75
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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.