Finding the Fourth Proportional to 74,911.20, 103,376.74 and 40,919.68
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Solution
The fourth proportional to 74,911.20, 103,376.74 and 40,919.68 is: 56,468.77
Step by Step Solution
- Step 1: Write the proportion equation
74,911.20 : 103,376.74 = 40,919.68 : x - Step 2: Convert to fraction form
74,911.20/103,376.74 = 40,919.68/x - Step 3: Cross multiply
74,911.20x = 103,376.74 × 40,919.68 - Step 4: Simplify right side
74,911.20x = 4,230,143,120.24 - Step 5: Solve for x
x = 4,230,143,120.24/74,911.20 - Step 6: Final answer
x = 56,468.77
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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.