Finding the Fourth Proportional to 71,187.40, 106,781.10 and 68,465.80
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Solution
The fourth proportional to 71,187.40, 106,781.10 and 68,465.80 is: 102,698.70
Step by Step Solution
- Step 1: Write the proportion equation
71,187.40 : 106,781.10 = 68,465.80 : x - Step 2: Convert to fraction form
71,187.40/106,781.10 = 68,465.80/x - Step 3: Cross multiply
71,187.40x = 106,781.10 × 68,465.80 - Step 4: Simplify right side
71,187.40x = 7,310,853,436.38 - Step 5: Solve for x
x = 7,310,853,436.38/71,187.40 - Step 6: Final answer
x = 102,698.70
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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.