Finding the Fourth Proportional to 71,811.19, 107,716.79 and 19,219.31
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Solution
The fourth proportional to 71,811.19, 107,716.79 and 19,219.31 is: 28,828.96
Step by Step Solution
- Step 1: Write the proportion equation
71,811.19 : 107,716.79 = 19,219.31 : x - Step 2: Convert to fraction form
71,811.19/107,716.79 = 19,219.31/x - Step 3: Cross multiply
71,811.19x = 107,716.79 × 19,219.31 - Step 4: Simplify right side
71,811.19x = 2,070,241,744.53 - Step 5: Solve for x
x = 2,070,241,744.53/71,811.19 - Step 6: Final answer
x = 28,828.96
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.