Finding the Fourth Proportional to 102,689.11, 141,705.91 and 57,358.07
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Solution
The fourth proportional to 102,689.11, 141,705.91 and 57,358.07 is: 79,151.31
Step by Step Solution
- Step 1: Write the proportion equation
102,689.11 : 141,705.91 = 57,358.07 : x - Step 2: Convert to fraction form
102,689.11/141,705.91 = 57,358.07/x - Step 3: Cross multiply
102,689.11x = 141,705.91 × 57,358.07 - Step 4: Simplify right side
102,689.11x = 8,127,977,505.19 - Step 5: Solve for x
x = 8,127,977,505.19/102,689.11 - Step 6: Final answer
x = 79,151.31
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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.