Finding the Fourth Proportional to 72,918.75, 100,627.94 and 39,384.75
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Solution
The fourth proportional to 72,918.75, 100,627.94 and 39,384.75 is: 54,350.99
Step by Step Solution
- Step 1: Write the proportion equation
72,918.75 : 100,627.94 = 39,384.75 : x - Step 2: Convert to fraction form
72,918.75/100,627.94 = 39,384.75/x - Step 3: Cross multiply
72,918.75x = 100,627.94 × 39,384.75 - Step 4: Simplify right side
72,918.75x = 3,963,206,358.38 - Step 5: Solve for x
x = 3,963,206,358.38/72,918.75 - Step 6: Final answer
x = 54,350.99
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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.