Finding the Fourth Proportional to 86,686.04, 129,821.26 and 47,145.08
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Solution
The fourth proportional to 86,686.04, 129,821.26 and 47,145.08 is: 70,604.61
Step by Step Solution
- Step 1: Write the proportion equation
86,686.04 : 129,821.26 = 47,145.08 : x - Step 2: Convert to fraction form
86,686.04/129,821.26 = 47,145.08/x - Step 3: Cross multiply
86,686.04x = 129,821.26 × 47,145.08 - Step 4: Simplify right side
86,686.04x = 6,120,433,688.40 - Step 5: Solve for x
x = 6,120,433,688.40/86,686.04 - Step 6: Final answer
x = 70,604.61
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.