Finding the Fourth Proportional to 209,670.42, 289,337.58 and 128,135.09
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Solution
The fourth proportional to 209,670.42, 289,337.58 and 128,135.09 is: 176,821.77
Step by Step Solution
- Step 1: Write the proportion equation
209,670.42 : 289,337.58 = 128,135.09 : x - Step 2: Convert to fraction form
209,670.42/289,337.58 = 128,135.09/x - Step 3: Cross multiply
209,670.42x = 289,337.58 × 128,135.09 - Step 4: Simplify right side
209,670.42x = 37,074,295,887.50 - Step 5: Solve for x
x = 37,074,295,887.50/209,670.42 - Step 6: Final answer
x = 176,821.77
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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.