Finding the Fourth Proportional to 74,731.11, 103,125.74 and 40,738.79
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Solution
The fourth proportional to 74,731.11, 103,125.74 and 40,738.79 is: 56,217.78
Step by Step Solution
- Step 1: Write the proportion equation
74,731.11 : 103,125.74 = 40,738.79 : x - Step 2: Convert to fraction form
74,731.11/103,125.74 = 40,738.79/x - Step 3: Cross multiply
74,731.11x = 103,125.74 × 40,738.79 - Step 4: Simplify right side
74,731.11x = 4,201,217,146.13 - Step 5: Solve for x
x = 4,201,217,146.13/74,731.11 - Step 6: Final answer
x = 56,217.78
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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.