Finding the Fourth Proportional to 76,615.20, 114,676.56 and 40,987.62
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Solution
The fourth proportional to 76,615.20, 114,676.56 and 40,987.62 is: 61,349.70
Step by Step Solution
- Step 1: Write the proportion equation
76,615.20 : 114,676.56 = 40,987.62 : x - Step 2: Convert to fraction form
76,615.20/114,676.56 = 40,987.62/x - Step 3: Cross multiply
76,615.20x = 114,676.56 × 40,987.62 - Step 4: Simplify right side
76,615.20x = 4,700,319,264.19 - Step 5: Solve for x
x = 4,700,319,264.19/76,615.20 - Step 6: Final answer
x = 61,349.70
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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.