Finding the Fourth Proportional to 208,203.12, 287,319.96 and 112,709.79
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Solution
The fourth proportional to 208,203.12, 287,319.96 and 112,709.79 is: 155,539.32
Step by Step Solution
- Step 1: Write the proportion equation
208,203.12 : 287,319.96 = 112,709.79 : x - Step 2: Convert to fraction form
208,203.12/287,319.96 = 112,709.79/x - Step 3: Cross multiply
208,203.12x = 287,319.96 × 112,709.79 - Step 4: Simplify right side
208,203.12x = 32,383,772,354.41 - Step 5: Solve for x
x = 32,383,772,354.41/208,203.12 - Step 6: Final answer
x = 155,539.32
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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.