Finding the Fourth Proportional to 208,631.41, 287,911.50 and 113,138.08
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Solution
The fourth proportional to 208,631.41, 287,911.50 and 113,138.08 is: 156,130.63
Step by Step Solution
- Step 1: Write the proportion equation
208,631.41 : 287,911.50 = 113,138.08 : x - Step 2: Convert to fraction form
208,631.41/287,911.50 = 113,138.08/x - Step 3: Cross multiply
208,631.41x = 287,911.50 × 113,138.08 - Step 4: Simplify right side
208,631.41x = 32,573,754,319.92 - Step 5: Solve for x
x = 32,573,754,319.92/208,631.41 - Step 6: Final answer
x = 156,130.63
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1.5x scale
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.