Finding the Fourth Proportional to 86,645.70, 129,859.20 and 42,176.70
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Solution
The fourth proportional to 86,645.70, 129,859.20 and 42,176.70 is: 63,211.82
Step by Step Solution
- Step 1: Write the proportion equation
86,645.70 : 129,859.20 = 42,176.70 : x - Step 2: Convert to fraction form
86,645.70/129,859.20 = 42,176.70/x - Step 3: Cross multiply
86,645.70x = 129,859.20 × 42,176.70 - Step 4: Simplify right side
86,645.70x = 5,477,032,520.64 - Step 5: Solve for x
x = 5,477,032,520.64/86,645.70 - Step 6: Final answer
x = 63,211.82
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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.