Finding the Fourth Proportional to 128,578,343.08, 177,452,832.74 and 72,078,348.99
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Solution
The fourth proportional to 128,578,343.08, 177,452,832.74 and 72,078,348.99 is: 99,476,372.93
Step by Step Solution
- Step 1: Write the proportion equation
128,578,343.08 : 177,452,832.74 = 72,078,348.99 : x - Step 2: Convert to fraction form
128,578,343.08/177,452,832.74 = 72,078,348.99/x - Step 3: Cross multiply
128,578,343.08x = 177,452,832.74 × 72,078,348.99 - Step 4: Simplify right side
128,578,343.08x = 12,790,507,207,497,818 - Step 5: Solve for x
x = 12,790,507,207,497,818/128,578,343.08 - Step 6: Final answer
x = 99,476,372.93
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.