Finding the Fourth Proportional to 139,640.76, 192,671.46 and 79,197.75
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Solution
The fourth proportional to 139,640.76, 192,671.46 and 79,197.75 is: 109,274.30
Step by Step Solution
- Step 1: Write the proportion equation
139,640.76 : 192,671.46 = 79,197.75 : x - Step 2: Convert to fraction form
139,640.76/192,671.46 = 79,197.75/x - Step 3: Cross multiply
139,640.76x = 192,671.46 × 79,197.75 - Step 4: Simplify right side
139,640.76x = 15,259,146,121.22 - Step 5: Solve for x
x = 15,259,146,121.22/139,640.76 - Step 6: Final answer
x = 109,274.30
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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.