Finding the Fourth Proportional to 122,243.20, 168,731.46 and 79,808.08
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Solution
The fourth proportional to 122,243.20, 168,731.46 and 79,808.08 is: 110,158.55
Step by Step Solution
- Step 1: Write the proportion equation
122,243.20 : 168,731.46 = 79,808.08 : x - Step 2: Convert to fraction form
122,243.20/168,731.46 = 79,808.08/x - Step 3: Cross multiply
122,243.20x = 168,731.46 × 79,808.08 - Step 4: Simplify right side
122,243.20x = 13,466,133,858.20 - Step 5: Solve for x
x = 13,466,133,858.20/122,243.20 - Step 6: Final answer
x = 110,158.55
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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.