Finding the Fourth Proportional to 121,421.80, 182,132.70 and 38,315.80
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Solution
The fourth proportional to 121,421.80, 182,132.70 and 38,315.80 is: 57,473.70
Step by Step Solution
- Step 1: Write the proportion equation
121,421.80 : 182,132.70 = 38,315.80 : x - Step 2: Convert to fraction form
121,421.80/182,132.70 = 38,315.80/x - Step 3: Cross multiply
121,421.80x = 182,132.70 × 38,315.80 - Step 4: Simplify right side
121,421.80x = 6,978,560,106.66 - Step 5: Solve for x
x = 6,978,560,106.66/121,421.80 - Step 6: Final answer
x = 57,473.70
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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.