Finding the Fourth Proportional to 74,390.72, 102,658.86 and 40,398.96
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Solution
The fourth proportional to 74,390.72, 102,658.86 and 40,398.96 is: 55,750.39
Step by Step Solution
- Step 1: Write the proportion equation
74,390.72 : 102,658.86 = 40,398.96 : x - Step 2: Convert to fraction form
74,390.72/102,658.86 = 40,398.96/x - Step 3: Cross multiply
74,390.72x = 102,658.86 × 40,398.96 - Step 4: Simplify right side
74,390.72x = 4,147,311,178.79 - Step 5: Solve for x
x = 4,147,311,178.79/74,390.72 - Step 6: Final answer
x = 55,750.39
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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.