Finding the Fourth Proportional to 138,404.19, 190,997.78 and 74,741.99
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Solution
The fourth proportional to 138,404.19, 190,997.78 and 74,741.99 is: 103,143.94
Step by Step Solution
- Step 1: Write the proportion equation
138,404.19 : 190,997.78 = 74,741.99 : x - Step 2: Convert to fraction form
138,404.19/190,997.78 = 74,741.99/x - Step 3: Cross multiply
138,404.19x = 190,997.78 × 74,741.99 - Step 4: Simplify right side
138,404.19x = 14,275,554,328.87 - Step 5: Solve for x
x = 14,275,554,328.87/138,404.19 - Step 6: Final answer
x = 103,143.94
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.