Finding the Fourth Proportional to 128,147.81, 192,214.08 and 39,400.70
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Solution
The fourth proportional to 128,147.81, 192,214.08 and 39,400.70 is: 59,098.70
Step by Step Solution
- Step 1: Write the proportion equation
128,147.81 : 192,214.08 = 39,400.70 : x - Step 2: Convert to fraction form
128,147.81/192,214.08 = 39,400.70/x - Step 3: Cross multiply
128,147.81x = 192,214.08 × 39,400.70 - Step 4: Simplify right side
128,147.81x = 7,573,368,340.79 - Step 5: Solve for x
x = 7,573,368,340.79/128,147.81 - Step 6: Final answer
x = 59,098.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.