Finding the Fourth Proportional to 131,749.19, 181,691.07 and 121,963.58
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Solution
The fourth proportional to 131,749.19, 181,691.07 and 121,963.58 is: 168,196.05
Step by Step Solution
- Step 1: Write the proportion equation
131,749.19 : 181,691.07 = 121,963.58 : x - Step 2: Convert to fraction form
131,749.19/181,691.07 = 121,963.58/x - Step 3: Cross multiply
131,749.19x = 181,691.07 × 121,963.58 - Step 4: Simplify right side
131,749.19x = 22,159,693,351.23 - Step 5: Solve for x
x = 22,159,693,351.23/131,749.19 - Step 6: Final answer
x = 168,196.05
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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.