Finding the Fourth Proportional to 74,221.31, 102,431.89 and 40,693.79
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Solution
The fourth proportional to 74,221.31, 102,431.89 and 40,693.79 is: 56,160.99
Step by Step Solution
- Step 1: Write the proportion equation
74,221.31 : 102,431.89 = 40,693.79 : x - Step 2: Convert to fraction form
74,221.31/102,431.89 = 40,693.79/x - Step 3: Cross multiply
74,221.31x = 102,431.89 × 40,693.79 - Step 4: Simplify right side
74,221.31x = 4,168,342,127.91 - Step 5: Solve for x
x = 4,168,342,127.91/74,221.31 - Step 6: Final answer
x = 56,160.99
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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.