Finding the Fourth Proportional to 72,509.94, 100,065.24 and 40,680.99
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Solution
The fourth proportional to 72,509.94, 100,065.24 and 40,680.99 is: 56,140.62
Step by Step Solution
- Step 1: Write the proportion equation
72,509.94 : 100,065.24 = 40,680.99 : x - Step 2: Convert to fraction form
72,509.94/100,065.24 = 40,680.99/x - Step 3: Cross multiply
72,509.94x = 100,065.24 × 40,680.99 - Step 4: Simplify right side
72,509.94x = 4,070,753,027.79 - Step 5: Solve for x
x = 4,070,753,027.79/72,509.94 - Step 6: Final answer
x = 56,140.62
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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.