Finding the Fourth Proportional to 103,976.80, 155,965.20 and 97,415.80
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Solution
The fourth proportional to 103,976.80, 155,965.20 and 97,415.80 is: 146,123.70
Step by Step Solution
- Step 1: Write the proportion equation
103,976.80 : 155,965.20 = 97,415.80 : x - Step 2: Convert to fraction form
103,976.80/155,965.20 = 97,415.80/x - Step 3: Cross multiply
103,976.80x = 155,965.20 × 97,415.80 - Step 4: Simplify right side
103,976.80x = 15,193,474,730.16 - Step 5: Solve for x
x = 15,193,474,730.16/103,976.80 - Step 6: Final answer
x = 146,123.70
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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.