Finding the Fourth Proportional to 137,689.78, 190,011.99 and 77,252.08
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Solution
The fourth proportional to 137,689.78, 190,011.99 and 77,252.08 is: 106,607.92
Step by Step Solution
- Step 1: Write the proportion equation
137,689.78 : 190,011.99 = 77,252.08 : x - Step 2: Convert to fraction form
137,689.78/190,011.99 = 77,252.08/x - Step 3: Cross multiply
137,689.78x = 190,011.99 × 77,252.08 - Step 4: Simplify right side
137,689.78x = 14,678,821,452.44 - Step 5: Solve for x
x = 14,678,821,452.44/137,689.78 - Step 6: Final answer
x = 106,607.92
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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.