Finding the Fourth Proportional to 129,878.80, 195,048.60 and 100,368.40
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Solution
The fourth proportional to 129,878.80, 195,048.60 and 100,368.40 is: 150,730.65
Step by Step Solution
- Step 1: Write the proportion equation
129,878.80 : 195,048.60 = 100,368.40 : x - Step 2: Convert to fraction form
129,878.80/195,048.60 = 100,368.40/x - Step 3: Cross multiply
129,878.80x = 195,048.60 × 100,368.40 - Step 4: Simplify right side
129,878.80x = 19,576,715,904.24 - Step 5: Solve for x
x = 19,576,715,904.24/129,878.80 - Step 6: Final answer
x = 150,730.65
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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.