Finding the Fourth Proportional to 128,720,110.80, 193,089,497.40 and 77,491,822.80
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Solution
The fourth proportional to 128,720,110.80, 193,089,497.40 and 77,491,822.80 is: 116,243,351.75
Step by Step Solution
- Step 1: Write the proportion equation
128,720,110.80 : 193,089,497.40 = 77,491,822.80 : x - Step 2: Convert to fraction form
128,720,110.80/193,089,497.40 = 77,491,822.80/x - Step 3: Cross multiply
128,720,110.80x = 193,089,497.40 × 77,491,822.80 - Step 4: Simplify right side
128,720,110.80x = 14,962,857,117,061,860 - Step 5: Solve for x
x = 14,962,857,117,061,860/128,720,110.80 - Step 6: Final answer
x = 116,243,351.75
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.