Finding the Fourth Proportional to 143,041.19, 197,390.18 and 79,378.43
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Solution
The fourth proportional to 143,041.19, 197,390.18 and 79,378.43 is: 109,538.53
Step by Step Solution
- Step 1: Write the proportion equation
143,041.19 : 197,390.18 = 79,378.43 : x - Step 2: Convert to fraction form
143,041.19/197,390.18 = 79,378.43/x - Step 3: Cross multiply
143,041.19x = 197,390.18 × 79,378.43 - Step 4: Simplify right side
143,041.19x = 15,668,521,797.31 - Step 5: Solve for x
x = 15,668,521,797.31/143,041.19 - Step 6: Final answer
x = 109,538.53
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.