Finding the Fourth Proportional to 149,983.12, 206,989.51 and 85,472.09
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Solution
The fourth proportional to 149,983.12, 206,989.51 and 85,472.09 is: 117,958.77
Step by Step Solution
- Step 1: Write the proportion equation
149,983.12 : 206,989.51 = 85,472.09 : x - Step 2: Convert to fraction form
149,983.12/206,989.51 = 85,472.09/x - Step 3: Cross multiply
149,983.12x = 206,989.51 × 85,472.09 - Step 4: Simplify right side
149,983.12x = 17,691,824,565.47 - Step 5: Solve for x
x = 17,691,824,565.47/149,983.12 - Step 6: Final answer
x = 117,958.77
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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.