Finding the Fourth Proportional to 217,218.24, 299,769.26 and 121,721.40
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Solution
The fourth proportional to 217,218.24, 299,769.26 and 121,721.40 is: 167,980.06
Step by Step Solution
- Step 1: Write the proportion equation
217,218.24 : 299,769.26 = 121,721.40 : x - Step 2: Convert to fraction form
217,218.24/299,769.26 = 121,721.40/x - Step 3: Cross multiply
217,218.24x = 299,769.26 × 121,721.40 - Step 4: Simplify right side
217,218.24x = 36,488,334,004.16 - Step 5: Solve for x
x = 36,488,334,004.16/217,218.24 - Step 6: Final answer
x = 167,980.06
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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.