Finding the Fourth Proportional to 3,938,855,105.99, 5,435,603,794.01 and 2,130,368,994.77
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Solution
The fourth proportional to 3,938,855,105.99, 5,435,603,794.01 and 2,130,368,994.77 is: 2,939,900,422.59
Step by Step Solution
- Step 1: Write the proportion equation
3,938,855,105.99 : 5,435,603,794.01 = 2,130,368,994.77 : x - Step 2: Convert to fraction form
3,938,855,105.99/5,435,603,794.01 = 2,130,368,994.77/x - Step 3: Cross multiply
3,938,855,105.99x = 5,435,603,794.01 × 2,130,368,994.77 - Step 4: Simplify right side
3,938,855,105.99x = 11,579,841,790,613,082,112 - Step 5: Solve for x
x = 11,579,841,790,613,082,112/3,938,855,105.99 - Step 6: Final answer
x = 2,939,900,422.59
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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.