Finding the Fourth Proportional to 129,363.28, 178,455.98 and 75,613.18
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Solution
The fourth proportional to 129,363.28, 178,455.98 and 75,613.18 is: 104,307.99
Step by Step Solution
- Step 1: Write the proportion equation
129,363.28 : 178,455.98 = 75,613.18 : x - Step 2: Convert to fraction form
129,363.28/178,455.98 = 75,613.18/x - Step 3: Cross multiply
129,363.28x = 178,455.98 × 75,613.18 - Step 4: Simplify right side
129,363.28x = 13,493,624,137.82 - Step 5: Solve for x
x = 13,493,624,137.82/129,363.28 - Step 6: Final answer
x = 104,307.99
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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.