Finding the Fourth Proportional to 128,043.18, 176,709.60 and 71,463.06
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Solution
The fourth proportional to 128,043.18, 176,709.60 and 71,463.06 is: 98,624.61
Step by Step Solution
- Step 1: Write the proportion equation
128,043.18 : 176,709.60 = 71,463.06 : x - Step 2: Convert to fraction form
128,043.18/176,709.60 = 71,463.06/x - Step 3: Cross multiply
128,043.18x = 176,709.60 × 71,463.06 - Step 4: Simplify right side
128,043.18x = 12,628,208,747.38 - Step 5: Solve for x
x = 12,628,208,747.38/128,043.18 - Step 6: Final answer
x = 98,624.61
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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.