Finding the Fourth Proportional to 138,718.92, 191,432.76 and 78,292.08
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Solution
The fourth proportional to 138,718.92, 191,432.76 and 78,292.08 is: 108,043.44
Step by Step Solution
- Step 1: Write the proportion equation
138,718.92 : 191,432.76 = 78,292.08 : x - Step 2: Convert to fraction form
138,718.92/191,432.76 = 78,292.08/x - Step 3: Cross multiply
138,718.92x = 191,432.76 × 78,292.08 - Step 4: Simplify right side
138,718.92x = 14,987,668,960.54 - Step 5: Solve for x
x = 14,987,668,960.54/138,718.92 - Step 6: Final answer
x = 108,043.44
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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.