Finding the Fourth Proportional to 149,931.20, 206,912.76 and 86,278.52
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Solution
The fourth proportional to 149,931.20, 206,912.76 and 86,278.52 is: 119,068.79
Step by Step Solution
- Step 1: Write the proportion equation
149,931.20 : 206,912.76 = 86,278.52 : x - Step 2: Convert to fraction form
149,931.20/206,912.76 = 86,278.52/x - Step 3: Cross multiply
149,931.20x = 206,912.76 × 86,278.52 - Step 4: Simplify right side
149,931.20x = 17,852,126,701.92 - Step 5: Solve for x
x = 17,852,126,701.92/149,931.20 - Step 6: Final answer
x = 119,068.79
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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.