Finding the Fourth Proportional to 138,869.27, 191,639.17 and 75,207.05
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Solution
The fourth proportional to 138,869.27, 191,639.17 and 75,207.05 is: 103,785.50
Step by Step Solution
- Step 1: Write the proportion equation
138,869.27 : 191,639.17 = 75,207.05 : x - Step 2: Convert to fraction form
138,869.27/191,639.17 = 75,207.05/x - Step 3: Cross multiply
138,869.27x = 191,639.17 × 75,207.05 - Step 4: Simplify right side
138,869.27x = 14,412,616,640.15 - Step 5: Solve for x
x = 14,412,616,640.15/138,869.27 - Step 6: Final answer
x = 103,785.50
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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.