Finding the Fourth Proportional to 128,542,430.38, 177,442,861.18 and 86,783,062.93
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Solution
The fourth proportional to 128,542,430.38, 177,442,861.18 and 86,783,062.93 is: 119,797,291.38
Step by Step Solution
- Step 1: Write the proportion equation
128,542,430.38 : 177,442,861.18 = 86,783,062.93 : x - Step 2: Convert to fraction form
128,542,430.38/177,442,861.18 = 86,783,062.93/x - Step 3: Cross multiply
128,542,430.38x = 177,442,861.18 × 86,783,062.93 - Step 4: Simplify right side
128,542,430.38x = 15,399,034,987,819,586 - Step 5: Solve for x
x = 15,399,034,987,819,586/128,542,430.38 - Step 6: Final answer
x = 119,797,291.38
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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.