Finding the Fourth Proportional to 80,919,657.60, 121,379,486.40 and 80,415,772.80
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Solution
The fourth proportional to 80,919,657.60, 121,379,486.40 and 80,415,772.80 is: 120,623,659.20
Step by Step Solution
- Step 1: Write the proportion equation
80,919,657.60 : 121,379,486.40 = 80,415,772.80 : x - Step 2: Convert to fraction form
80,919,657.60/121,379,486.40 = 80,415,772.80/x - Step 3: Cross multiply
80,919,657.60x = 121,379,486.40 × 80,415,772.80 - Step 4: Simplify right side
80,919,657.60x = 9,760,825,200,923,090 - Step 5: Solve for x
x = 9,760,825,200,923,090/80,919,657.60 - Step 6: Final answer
x = 120,623,659.20
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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.