Finding the Fourth Proportional to 129,686.18, 194,512.86 and 40,948.65
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Solution
The fourth proportional to 129,686.18, 194,512.86 and 40,948.65 is: 61,417.80
Step by Step Solution
- Step 1: Write the proportion equation
129,686.18 : 194,512.86 = 40,948.65 : x - Step 2: Convert to fraction form
129,686.18/194,512.86 = 40,948.65/x - Step 3: Cross multiply
129,686.18x = 194,512.86 × 40,948.65 - Step 4: Simplify right side
129,686.18x = 7,965,039,024.64 - Step 5: Solve for x
x = 7,965,039,024.64/129,686.18 - Step 6: Final answer
x = 61,417.80
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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.