Finding the Fourth Proportional to 139,423.70, 209,135.55 and 126,957.80
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Solution
The fourth proportional to 139,423.70, 209,135.55 and 126,957.80 is: 190,436.70
Step by Step Solution
- Step 1: Write the proportion equation
139,423.70 : 209,135.55 = 126,957.80 : x - Step 2: Convert to fraction form
139,423.70/209,135.55 = 126,957.80/x - Step 3: Cross multiply
139,423.70x = 209,135.55 × 126,957.80 - Step 4: Simplify right side
139,423.70x = 26,551,389,329.79 - Step 5: Solve for x
x = 26,551,389,329.79/139,423.70 - Step 6: Final answer
x = 190,436.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.