Finding the Fourth Proportional to 121,909.91, 168,249.62 and 68,208.53
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Solution
The fourth proportional to 121,909.91, 168,249.62 and 68,208.53 is: 94,135.57
Step by Step Solution
- Step 1: Write the proportion equation
121,909.91 : 168,249.62 = 68,208.53 : x - Step 2: Convert to fraction form
121,909.91/168,249.62 = 68,208.53/x - Step 3: Cross multiply
121,909.91x = 168,249.62 × 68,208.53 - Step 4: Simplify right side
121,909.91x = 11,476,059,253.26 - Step 5: Solve for x
x = 11,476,059,253.26/121,909.91 - Step 6: Final answer
x = 94,135.57
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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.