Finding the Fourth Proportional to 189,267.30, 261,122.92 and 121,321.74
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Solution
The fourth proportional to 189,267.30, 261,122.92 and 121,321.74 is: 167,381.72
Step by Step Solution
- Step 1: Write the proportion equation
189,267.30 : 261,122.92 = 121,321.74 : x - Step 2: Convert to fraction form
189,267.30/261,122.92 = 121,321.74/x - Step 3: Cross multiply
189,267.30x = 261,122.92 × 121,321.74 - Step 4: Simplify right side
189,267.30x = 31,679,887,008.28 - Step 5: Solve for x
x = 31,679,887,008.28/189,267.30 - Step 6: Final answer
x = 167,381.72
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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.