Finding the Fourth Proportional to 71,621.09, 106,905.90 and 66,343.13
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Solution
The fourth proportional to 71,621.09, 106,905.90 and 66,343.13 is: 99,027.70
Step by Step Solution
- Step 1: Write the proportion equation
71,621.09 : 106,905.90 = 66,343.13 : x - Step 2: Convert to fraction form
71,621.09/106,905.90 = 66,343.13/x - Step 3: Cross multiply
71,621.09x = 106,905.90 × 66,343.13 - Step 4: Simplify right side
71,621.09x = 7,092,472,021.47 - Step 5: Solve for x
x = 7,092,472,021.47/71,621.09 - Step 6: Final answer
x = 99,027.70
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.