Finding the Fourth Proportional to 86,523.30, 129,821.40 and 47,108.70
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Solution
The fourth proportional to 86,523.30, 129,821.40 and 47,108.70 is: 70,682.90
Step by Step Solution
- Step 1: Write the proportion equation
86,523.30 : 129,821.40 = 47,108.70 : x - Step 2: Convert to fraction form
86,523.30/129,821.40 = 47,108.70/x - Step 3: Cross multiply
86,523.30x = 129,821.40 × 47,108.70 - Step 4: Simplify right side
86,523.30x = 6,115,717,386.18 - Step 5: Solve for x
x = 6,115,717,386.18/86,523.30 - Step 6: Final answer
x = 70,682.90
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1.5x scale
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.