Finding the Fourth Proportional to 77,203.20, 115,718.40 and 39,748.80
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Solution
The fourth proportional to 77,203.20, 115,718.40 and 39,748.80 is: 59,578.72
Step by Step Solution
- Step 1: Write the proportion equation
77,203.20 : 115,718.40 = 39,748.80 : x - Step 2: Convert to fraction form
77,203.20/115,718.40 = 39,748.80/x - Step 3: Cross multiply
77,203.20x = 115,718.40 × 39,748.80 - Step 4: Simplify right side
77,203.20x = 4,599,667,537.92 - Step 5: Solve for x
x = 4,599,667,537.92/77,203.20 - Step 6: Final answer
x = 59,578.72
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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.