Finding the Fourth Proportional to 71,147.80, 106,721.70 and 66,539.80
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Solution
The fourth proportional to 71,147.80, 106,721.70 and 66,539.80 is: 99,809.70
Step by Step Solution
- Step 1: Write the proportion equation
71,147.80 : 106,721.70 = 66,539.80 : x - Step 2: Convert to fraction form
71,147.80/106,721.70 = 66,539.80/x - Step 3: Cross multiply
71,147.80x = 106,721.70 × 66,539.80 - Step 4: Simplify right side
71,147.80x = 7,101,240,573.66 - Step 5: Solve for x
x = 7,101,240,573.66/71,147.80 - Step 6: Final answer
x = 99,809.70
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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.