Finding the Fourth Proportional to 84,278,747.21, 126,331,921.62 and 42,702,604.70
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Solution
The fourth proportional to 84,278,747.21, 126,331,921.62 and 42,702,604.70 is: 64,010,231.38
Step by Step Solution
- Step 1: Write the proportion equation
84,278,747.21 : 126,331,921.62 = 42,702,604.70 : x - Step 2: Convert to fraction form
84,278,747.21/126,331,921.62 = 42,702,604.70/x - Step 3: Cross multiply
84,278,747.21x = 126,331,921.62 × 42,702,604.70 - Step 4: Simplify right side
84,278,747.21x = 5,394,702,109,298,584 - Step 5: Solve for x
x = 5,394,702,109,298,584/84,278,747.21 - Step 6: Final answer
x = 64,010,231.38
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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.