Finding the Fourth Proportional to 139,706.87, 192,790.11 and 79,273.91
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Solution
The fourth proportional to 139,706.87, 192,790.11 and 79,273.91 is: 109,394.95
Step by Step Solution
- Step 1: Write the proportion equation
139,706.87 : 192,790.11 = 79,273.91 : x - Step 2: Convert to fraction form
139,706.87/192,790.11 = 79,273.91/x - Step 3: Cross multiply
139,706.87x = 192,790.11 × 79,273.91 - Step 4: Simplify right side
139,706.87x = 15,283,224,865.08 - Step 5: Solve for x
x = 15,283,224,865.08/139,706.87 - Step 6: Final answer
x = 109,394.95
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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.