Finding the Fourth Proportional to 79,719,309.40, 119,578,965.64 and 19,135,035.40
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Solution
The fourth proportional to 79,719,309.40, 119,578,965.64 and 19,135,035.40 is: 28,702,553.47
Step by Step Solution
- Step 1: Write the proportion equation
79,719,309.40 : 119,578,965.64 = 19,135,035.40 : x - Step 2: Convert to fraction form
79,719,309.40/119,578,965.64 = 19,135,035.40/x - Step 3: Cross multiply
79,719,309.40x = 119,578,965.64 × 19,135,035.40 - Step 4: Simplify right side
79,719,309.40x = 2,288,147,740,616,783.50 - Step 5: Solve for x
x = 2,288,147,740,616,783.50/79,719,309.40 - Step 6: Final answer
x = 28,702,553.47
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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.