Finding the Fourth Proportional to 189,878.99, 261,794.84 and 121,775.81
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Solution
The fourth proportional to 189,878.99, 261,794.84 and 121,775.81 is: 167,897.87
Step by Step Solution
- Step 1: Write the proportion equation
189,878.99 : 261,794.84 = 121,775.81 : x - Step 2: Convert to fraction form
189,878.99/261,794.84 = 121,775.81/x - Step 3: Cross multiply
189,878.99x = 261,794.84 × 121,775.81 - Step 4: Simplify right side
189,878.99x = 31,880,276,776.97 - Step 5: Solve for x
x = 31,880,276,776.97/189,878.99 - Step 6: Final answer
x = 167,897.87
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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.