Finding the Fourth Proportional to 138,581,858.40, 191,251,842.84 and 79,843,456.14
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Solution
The fourth proportional to 138,581,858.40, 191,251,842.84 and 79,843,456.14 is: 110,189,084.64
Step by Step Solution
- Step 1: Write the proportion equation
138,581,858.40 : 191,251,842.84 = 79,843,456.14 : x - Step 2: Convert to fraction form
138,581,858.40/191,251,842.84 = 79,843,456.14/x - Step 3: Cross multiply
138,581,858.40x = 191,251,842.84 × 79,843,456.14 - Step 4: Simplify right side
138,581,858.40x = 15,270,208,125,489,714 - Step 5: Solve for x
x = 15,270,208,125,489,714/138,581,858.40 - Step 6: Final answer
x = 110,189,084.64
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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.