Finding the Fourth Proportional to 79,487,999.20, 119,231,998.80 and 66,733,415.20
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Solution
The fourth proportional to 79,487,999.20, 119,231,998.80 and 66,733,415.20 is: 100,100,122.80
Step by Step Solution
- Step 1: Write the proportion equation
79,487,999.20 : 119,231,998.80 = 66,733,415.20 : x - Step 2: Convert to fraction form
79,487,999.20/119,231,998.80 = 66,733,415.20/x - Step 3: Cross multiply
79,487,999.20x = 119,231,998.80 × 66,733,415.20 - Step 4: Simplify right side
79,487,999.20x = 7,956,758,481,046,302 - Step 5: Solve for x
x = 7,956,758,481,046,302/79,487,999.20 - Step 6: Final answer
x = 100,100,122.80
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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.