Finding the Fourth Proportional to 129,240.20, 193,860.30 and 66,929.80
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Solution
The fourth proportional to 129,240.20, 193,860.30 and 66,929.80 is: 100,394.70
Step by Step Solution
- Step 1: Write the proportion equation
129,240.20 : 193,860.30 = 66,929.80 : x - Step 2: Convert to fraction form
129,240.20/193,860.30 = 66,929.80/x - Step 3: Cross multiply
129,240.20x = 193,860.30 × 66,929.80 - Step 4: Simplify right side
129,240.20x = 12,975,031,106.94 - Step 5: Solve for x
x = 12,975,031,106.94/129,240.20 - Step 6: Final answer
x = 100,394.70
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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.