Finding the Fourth Proportional to 129,809.40, 194,579.70 and 70,519.80
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Solution
The fourth proportional to 129,809.40, 194,579.70 and 70,519.80 is: 105,706.69
Step by Step Solution
- Step 1: Write the proportion equation
129,809.40 : 194,579.70 = 70,519.80 : x - Step 2: Convert to fraction form
129,809.40/194,579.70 = 70,519.80/x - Step 3: Cross multiply
129,809.40x = 194,579.70 × 70,519.80 - Step 4: Simplify right side
129,809.40x = 13,721,721,528.06 - Step 5: Solve for x
x = 13,721,721,528.06/129,809.40 - Step 6: Final answer
x = 105,706.69
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1.5x scale
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.