Finding the Fourth Proportional to 129,270.14, 178,349.91 and 105,355.70
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Solution
The fourth proportional to 129,270.14, 178,349.91 and 105,355.70 is: 145,355.92
Step by Step Solution
- Step 1: Write the proportion equation
129,270.14 : 178,349.91 = 105,355.70 : x - Step 2: Convert to fraction form
129,270.14/178,349.91 = 105,355.70/x - Step 3: Cross multiply
129,270.14x = 178,349.91 × 105,355.70 - Step 4: Simplify right side
129,270.14x = 18,790,179,612.99 - Step 5: Solve for x
x = 18,790,179,612.99/129,270.14 - Step 6: Final answer
x = 145,355.92
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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.