Finding the Fourth Proportional to 7,158,851.68, 9,879,216.60 and 3,939,587.68
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Solution
The fourth proportional to 7,158,851.68, 9,879,216.60 and 3,939,587.68 is: 5,436,631.70
Step by Step Solution
- Step 1: Write the proportion equation
7,158,851.68 : 9,879,216.60 = 3,939,587.68 : x - Step 2: Convert to fraction form
7,158,851.68/9,879,216.60 = 3,939,587.68/x - Step 3: Cross multiply
7,158,851.68x = 9,879,216.60 × 3,939,587.68 - Step 4: Simplify right side
7,158,851.68x = 38,920,040,005,411.48 - Step 5: Solve for x
x = 38,920,040,005,411.48/7,158,851.68 - Step 6: Final answer
x = 5,436,631.70
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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.