Finding the Fourth Proportional to 115,721.18, 159,687.70 and 64,725.08
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Solution
The fourth proportional to 115,721.18, 159,687.70 and 64,725.08 is: 89,316.39
Step by Step Solution
- Step 1: Write the proportion equation
115,721.18 : 159,687.70 = 64,725.08 : x - Step 2: Convert to fraction form
115,721.18/159,687.70 = 64,725.08/x - Step 3: Cross multiply
115,721.18x = 159,687.70 × 64,725.08 - Step 4: Simplify right side
115,721.18x = 10,335,798,035.45 - Step 5: Solve for x
x = 10,335,798,035.45/115,721.18 - Step 6: Final answer
x = 89,316.39
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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.