Finding the Fourth Proportional to 138,639.78, 191,149.28 and 115,702.46
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Solution
The fourth proportional to 138,639.78, 191,149.28 and 115,702.46 is: 159,524.50
Step by Step Solution
- Step 1: Write the proportion equation
138,639.78 : 191,149.28 = 115,702.46 : x - Step 2: Convert to fraction form
138,639.78/191,149.28 = 115,702.46/x - Step 3: Cross multiply
138,639.78x = 191,149.28 × 115,702.46 - Step 4: Simplify right side
138,639.78x = 22,116,441,923.23 - Step 5: Solve for x
x = 22,116,441,923.23/138,639.78 - Step 6: Final answer
x = 159,524.50
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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.