Finding the Fourth Proportional to 82,778.91, 124,242.18 and 38,430.66
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Solution
The fourth proportional to 82,778.91, 124,242.18 and 38,430.66 is: 57,680.26
Step by Step Solution
- Step 1: Write the proportion equation
82,778.91 : 124,242.18 = 38,430.66 : x - Step 2: Convert to fraction form
82,778.91/124,242.18 = 38,430.66/x - Step 3: Cross multiply
82,778.91x = 124,242.18 × 38,430.66 - Step 4: Simplify right side
82,778.91x = 4,774,708,977.24 - Step 5: Solve for x
x = 4,774,708,977.24/82,778.91 - Step 6: Final answer
x = 57,680.26
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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.