Finding the Fourth Proportional to 91,293.20, 136,939.80 and 28,963.70
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Solution
The fourth proportional to 91,293.20, 136,939.80 and 28,963.70 is: 43,445.55
Step by Step Solution
- Step 1: Write the proportion equation
91,293.20 : 136,939.80 = 28,963.70 : x - Step 2: Convert to fraction form
91,293.20/136,939.80 = 28,963.70/x - Step 3: Cross multiply
91,293.20x = 136,939.80 × 28,963.70 - Step 4: Simplify right side
91,293.20x = 3,966,283,285.26 - Step 5: Solve for x
x = 3,966,283,285.26/91,293.20 - Step 6: Final answer
x = 43,445.55
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.