Finding the Fourth Proportional to 81,424,007.30, 122,136,010.95 and 57,190,297.70
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Solution
The fourth proportional to 81,424,007.30, 122,136,010.95 and 57,190,297.70 is: 85,785,446.55
Step by Step Solution
- Step 1: Write the proportion equation
81,424,007.30 : 122,136,010.95 = 57,190,297.70 : x - Step 2: Convert to fraction form
81,424,007.30/122,136,010.95 = 57,190,297.70/x - Step 3: Cross multiply
81,424,007.30x = 122,136,010.95 × 57,190,297.70 - Step 4: Simplify right side
81,424,007.30x = 6,984,994,826,120,960 - Step 5: Solve for x
x = 6,984,994,826,120,960/81,424,007.30 - Step 6: Final answer
x = 85,785,446.55
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Double scale
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Similar ratio
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1.5x scale
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.