Finding the Fourth Proportional to 7,178,880.96, 9,906,886.44 and 3,915,765.79
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Solution
The fourth proportional to 7,178,880.96, 9,906,886.44 and 3,915,765.79 is: 5,403,773.54
Step by Step Solution
- Step 1: Write the proportion equation
7,178,880.96 : 9,906,886.44 = 3,915,765.79 : x - Step 2: Convert to fraction form
7,178,880.96/9,906,886.44 = 3,915,765.79/x - Step 3: Cross multiply
7,178,880.96x = 9,906,886.44 × 3,915,765.79 - Step 4: Simplify right side
7,178,880.96x = 38,793,046,982,399.67 - Step 5: Solve for x
x = 38,793,046,982,399.67/7,178,880.96 - Step 6: Final answer
x = 5,403,773.54
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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.