Finding the Fourth Proportional to 78,639,216.12, 117,958,722.73 and 21,131,487.97
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Solution
The fourth proportional to 78,639,216.12, 117,958,722.73 and 21,131,487.97 is: 31,697,204.69
Step by Step Solution
- Step 1: Write the proportion equation
78,639,216.12 : 117,958,722.73 = 21,131,487.97 : x - Step 2: Convert to fraction form
78,639,216.12/117,958,722.73 = 21,131,487.97/x - Step 3: Cross multiply
78,639,216.12x = 117,958,722.73 × 21,131,487.97 - Step 4: Simplify right side
78,639,216.12x = 2,492,643,329,977,835.50 - Step 5: Solve for x
x = 2,492,643,329,977,835.50/78,639,216.12 - Step 6: Final answer
x = 31,697,204.69
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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.