Finding the Fourth Proportional to 217,243.92, 299,808.36 and 121,781.28
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Solution
The fourth proportional to 217,243.92, 299,808.36 and 121,781.28 is: 168,064.75
Step by Step Solution
- Step 1: Write the proportion equation
217,243.92 : 299,808.36 = 121,781.28 : x - Step 2: Convert to fraction form
217,243.92/299,808.36 = 121,781.28/x - Step 3: Cross multiply
217,243.92x = 299,808.36 × 121,781.28 - Step 4: Simplify right side
217,243.92x = 36,511,045,835.50 - Step 5: Solve for x
x = 36,511,045,835.50/217,243.92 - Step 6: Final answer
x = 168,064.75
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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.