Finding the Fourth Proportional to 138,872.76, 191,645.01 and 75,210.63
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Solution
The fourth proportional to 138,872.76, 191,645.01 and 75,210.63 is: 103,790.99
Step by Step Solution
- Step 1: Write the proportion equation
138,872.76 : 191,645.01 = 75,210.63 : x - Step 2: Convert to fraction form
138,872.76/191,645.01 = 75,210.63/x - Step 3: Cross multiply
138,872.76x = 191,645.01 × 75,210.63 - Step 4: Simplify right side
138,872.76x = 14,413,741,938.46 - Step 5: Solve for x
x = 14,413,741,938.46/138,872.76 - Step 6: Final answer
x = 103,790.99
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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.