Finding the Fourth Proportional to 99,738,861.60, 149,720,266.80 and 77,120,032.80
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Solution
The fourth proportional to 99,738,861.60, 149,720,266.80 and 77,120,032.80 is: 115,766,629.99
Step by Step Solution
- Step 1: Write the proportion equation
99,738,861.60 : 149,720,266.80 = 77,120,032.80 : x - Step 2: Convert to fraction form
99,738,861.60/149,720,266.80 = 77,120,032.80/x - Step 3: Cross multiply
99,738,861.60x = 149,720,266.80 × 77,120,032.80 - Step 4: Simplify right side
99,738,861.60x = 11,546,431,886,440,752 - Step 5: Solve for x
x = 11,546,431,886,440,752/99,738,861.60 - Step 6: Final answer
x = 115,766,629.99
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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.