Finding the Fourth Proportional to 138,395.21, 190,999.49 and 84,715.70
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Solution
The fourth proportional to 138,395.21, 190,999.49 and 84,715.70 is: 116,916.29
Step by Step Solution
- Step 1: Write the proportion equation
138,395.21 : 190,999.49 = 84,715.70 : x - Step 2: Convert to fraction form
138,395.21/190,999.49 = 84,715.70/x - Step 3: Cross multiply
138,395.21x = 190,999.49 × 84,715.70 - Step 4: Simplify right side
138,395.21x = 16,180,654,592.94 - Step 5: Solve for x
x = 16,180,654,592.94/138,395.21 - Step 6: Final answer
x = 116,916.29
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.