Finding the Fourth Proportional to 80,881.81, 121,759.46 and 72,744.09
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Solution
The fourth proportional to 80,881.81, 121,759.46 and 72,744.09 is: 109,508.94
Step by Step Solution
- Step 1: Write the proportion equation
80,881.81 : 121,759.46 = 72,744.09 : x - Step 2: Convert to fraction form
80,881.81/121,759.46 = 72,744.09/x - Step 3: Cross multiply
80,881.81x = 121,759.46 × 72,744.09 - Step 4: Simplify right side
80,881.81x = 8,857,281,116.59 - Step 5: Solve for x
x = 8,857,281,116.59/80,881.81 - Step 6: Final answer
x = 109,508.94
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.