Finding the Fourth Proportional to 81,653,270.60, 122,479,905.90 and 47,215,893.80
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Solution
The fourth proportional to 81,653,270.60, 122,479,905.90 and 47,215,893.80 is: 70,823,840.70
Step by Step Solution
- Step 1: Write the proportion equation
81,653,270.60 : 122,479,905.90 = 47,215,893.80 : x - Step 2: Convert to fraction form
81,653,270.60/122,479,905.90 = 47,215,893.80/x - Step 3: Cross multiply
81,653,270.60x = 122,479,905.90 × 47,215,893.80 - Step 4: Simplify right side
81,653,270.60x = 5,782,998,229,608,393 - Step 5: Solve for x
x = 5,782,998,229,608,393/81,653,270.60 - Step 6: Final answer
x = 70,823,840.70
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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.