Finding the Fourth Proportional to 72,717.94, 109,064.76 and 20,132.74
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Solution
The fourth proportional to 72,717.94, 109,064.76 and 20,132.74 is: 30,195.75
Step by Step Solution
- Step 1: Write the proportion equation
72,717.94 : 109,064.76 = 20,132.74 : x - Step 2: Convert to fraction form
72,717.94/109,064.76 = 20,132.74/x - Step 3: Cross multiply
72,717.94x = 109,064.76 × 20,132.74 - Step 4: Simplify right side
72,717.94x = 2,195,772,456.24 - Step 5: Solve for x
x = 2,195,772,456.24/72,717.94 - Step 6: Final answer
x = 30,195.75
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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.