Finding the Fourth Proportional to 81,176.99, 121,708.25 and 31,215.11
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Solution
The fourth proportional to 81,176.99, 121,708.25 and 31,215.11 is: 46,800.65
Step by Step Solution
- Step 1: Write the proportion equation
81,176.99 : 121,708.25 = 31,215.11 : x - Step 2: Convert to fraction form
81,176.99/121,708.25 = 31,215.11/x - Step 3: Cross multiply
81,176.99x = 121,708.25 × 31,215.11 - Step 4: Simplify right side
81,176.99x = 3,799,136,255.58 - Step 5: Solve for x
x = 3,799,136,255.58/81,176.99 - Step 6: Final answer
x = 46,800.65
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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.