Finding the Fourth Proportional to 115,459.68, 172,936.80 and 68,609.28
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Solution
The fourth proportional to 115,459.68, 172,936.80 and 68,609.28 is: 102,763.75
Step by Step Solution
- Step 1: Write the proportion equation
115,459.68 : 172,936.80 = 68,609.28 : x - Step 2: Convert to fraction form
115,459.68/172,936.80 = 68,609.28/x - Step 3: Cross multiply
115,459.68x = 172,936.80 × 68,609.28 - Step 4: Simplify right side
115,459.68x = 11,865,069,333.50 - Step 5: Solve for x
x = 11,865,069,333.50/115,459.68 - Step 6: Final answer
x = 102,763.75
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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.