Finding the Fourth Proportional to 138,675.12, 191,367.16 and 87,715.68
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Solution
The fourth proportional to 138,675.12, 191,367.16 and 87,715.68 is: 121,044.79
Step by Step Solution
- Step 1: Write the proportion equation
138,675.12 : 191,367.16 = 87,715.68 : x - Step 2: Convert to fraction form
138,675.12/191,367.16 = 87,715.68/x - Step 3: Cross multiply
138,675.12x = 191,367.16 × 87,715.68 - Step 4: Simplify right side
138,675.12x = 16,785,900,569.07 - Step 5: Solve for x
x = 16,785,900,569.07/138,675.12 - Step 6: Final answer
x = 121,044.79
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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.