Finding the Fourth Proportional to 121,934.98, 168,276.80 and 68,216.79
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Solution
The fourth proportional to 121,934.98, 168,276.80 and 68,216.79 is: 94,142.82
Step by Step Solution
- Step 1: Write the proportion equation
121,934.98 : 168,276.80 = 68,216.79 : x - Step 2: Convert to fraction form
121,934.98/168,276.80 = 68,216.79/x - Step 3: Cross multiply
121,934.98x = 168,276.80 × 68,216.79 - Step 4: Simplify right side
121,934.98x = 11,479,302,286.09 - Step 5: Solve for x
x = 11,479,302,286.09/121,934.98 - Step 6: Final answer
x = 94,142.82
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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.