Finding the Fourth Proportional to 81,656,245.80, 122,484,368.70 and 81,089,375.40
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Solution
The fourth proportional to 81,656,245.80, 122,484,368.70 and 81,089,375.40 is: 121,634,063.10
Step by Step Solution
- Step 1: Write the proportion equation
81,656,245.80 : 122,484,368.70 = 81,089,375.40 : x - Step 2: Convert to fraction form
81,656,245.80/122,484,368.70 = 81,089,375.40/x - Step 3: Cross multiply
81,656,245.80x = 122,484,368.70 × 81,089,375.40 - Step 4: Simplify right side
81,656,245.80x = 9,932,180,954,146,310 - Step 5: Solve for x
x = 9,932,180,954,146,310/81,656,245.80 - Step 6: Final answer
x = 121,634,063.10
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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.