Finding the Fourth Proportional to 3,938,855,104.99, 5,435,603,792.63 and 2,130,368,993.76
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Solution
The fourth proportional to 3,938,855,104.99, 5,435,603,792.63 and 2,130,368,993.76 is: 2,939,900,421.19
Step by Step Solution
- Step 1: Write the proportion equation
3,938,855,104.99 : 5,435,603,792.63 = 2,130,368,993.76 : x - Step 2: Convert to fraction form
3,938,855,104.99/5,435,603,792.63 = 2,130,368,993.76/x - Step 3: Cross multiply
3,938,855,104.99x = 5,435,603,792.63 × 2,130,368,993.76 - Step 4: Simplify right side
3,938,855,104.99x = 11,579,841,782,183,213,056 - Step 5: Solve for x
x = 11,579,841,782,183,213,056/3,938,855,104.99 - Step 6: Final answer
x = 2,939,900,421.19
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1.5x scale
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.