Finding the Fourth Proportional to 101,515.13, 140,091.20 and 54,947.99
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Solution
The fourth proportional to 101,515.13, 140,091.20 and 54,947.99 is: 75,828.39
Step by Step Solution
- Step 1: Write the proportion equation
101,515.13 : 140,091.20 = 54,947.99 : x - Step 2: Convert to fraction form
101,515.13/140,091.20 = 54,947.99/x - Step 3: Cross multiply
101,515.13x = 140,091.20 × 54,947.99 - Step 4: Simplify right side
101,515.13x = 7,697,729,293.60 - Step 5: Solve for x
x = 7,697,729,293.60/101,515.13 - Step 6: Final answer
x = 75,828.39
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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.