Finding the Fourth Proportional to 5,154,461.75, 7,112,742.40 and 2,979,145.80
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Solution
The fourth proportional to 5,154,461.75, 7,112,742.40 and 2,979,145.80 is: 4,110,981.45
Step by Step Solution
- Step 1: Write the proportion equation
5,154,461.75 : 7,112,742.40 = 2,979,145.80 : x - Step 2: Convert to fraction form
5,154,461.75/7,112,742.40 = 2,979,145.80/x - Step 3: Cross multiply
5,154,461.75x = 7,112,742.40 × 2,979,145.80 - Step 4: Simplify right side
5,154,461.75x = 21,189,896,647,441.92 - Step 5: Solve for x
x = 21,189,896,647,441.92/5,154,461.75 - Step 6: Final answer
x = 4,110,981.45
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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.