Finding the Fourth Proportional to 81,657,408.30, 122,486,112.45 and 74,099,136.30
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Solution
The fourth proportional to 81,657,408.30, 122,486,112.45 and 74,099,136.30 is: 111,148,704.45
Step by Step Solution
- Step 1: Write the proportion equation
81,657,408.30 : 122,486,112.45 = 74,099,136.30 : x - Step 2: Convert to fraction form
81,657,408.30/122,486,112.45 = 74,099,136.30/x - Step 3: Cross multiply
81,657,408.30x = 122,486,112.45 × 74,099,136.30 - Step 4: Simplify right side
81,657,408.30x = 9,076,115,141,289,676 - Step 5: Solve for x
x = 9,076,115,141,289,676/81,657,408.30 - Step 6: Final answer
x = 111,148,704.45
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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.