Finding the Fourth Proportional to 86,645.70, 129,968.55 and 47,279.70
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Solution
The fourth proportional to 86,645.70, 129,968.55 and 47,279.70 is: 70,919.55
Step by Step Solution
- Step 1: Write the proportion equation
86,645.70 : 129,968.55 = 47,279.70 : x - Step 2: Convert to fraction form
86,645.70/129,968.55 = 47,279.70/x - Step 3: Cross multiply
86,645.70x = 129,968.55 × 47,279.70 - Step 4: Simplify right side
86,645.70x = 6,144,874,053.44 - Step 5: Solve for x
x = 6,144,874,053.44/86,645.70 - Step 6: Final answer
x = 70,919.55
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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.