Finding the Fourth Proportional to 78,868,497.30, 118,302,745.95 and 65,431,569.30
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Solution
The fourth proportional to 78,868,497.30, 118,302,745.95 and 65,431,569.30 is: 98,147,353.95
Step by Step Solution
- Step 1: Write the proportion equation
78,868,497.30 : 118,302,745.95 = 65,431,569.30 : x - Step 2: Convert to fraction form
78,868,497.30/118,302,745.95 = 65,431,569.30/x - Step 3: Cross multiply
78,868,497.30x = 118,302,745.95 × 65,431,569.30 - Step 4: Simplify right side
78,868,497.30x = 7,740,734,320,007,719 - Step 5: Solve for x
x = 7,740,734,320,007,719/78,868,497.30 - Step 6: Final answer
x = 98,147,353.95
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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.