Finding the Fourth Proportional to 189,885.36, 261,803.64 and 121,782.18
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Solution
The fourth proportional to 189,885.36, 261,803.64 and 121,782.18 is: 167,906.67
Step by Step Solution
- Step 1: Write the proportion equation
189,885.36 : 261,803.64 = 121,782.18 : x - Step 2: Convert to fraction form
189,885.36/261,803.64 = 121,782.18/x - Step 3: Cross multiply
189,885.36x = 261,803.64 × 121,782.18 - Step 4: Simplify right side
189,885.36x = 31,883,018,011.14 - Step 5: Solve for x
x = 31,883,018,011.14/189,885.36 - Step 6: Final answer
x = 167,906.67
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1.5x scale
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.