Finding the Fourth Proportional to 74,342.80, 102,451.65 and 72,976.53
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Solution
The fourth proportional to 74,342.80, 102,451.65 and 72,976.53 is: 100,568.80
Step by Step Solution
- Step 1: Write the proportion equation
74,342.80 : 102,451.65 = 72,976.53 : x - Step 2: Convert to fraction form
74,342.80/102,451.65 = 72,976.53/x - Step 3: Cross multiply
74,342.80x = 102,451.65 × 72,976.53 - Step 4: Simplify right side
74,342.80x = 7,476,566,020.31 - Step 5: Solve for x
x = 7,476,566,020.31/74,342.80 - Step 6: Final answer
x = 100,568.80
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1.5x scale
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.