Finding the Fourth Proportional to 136,919.14, 188,946.36 and 76,490.74
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Solution
The fourth proportional to 136,919.14, 188,946.36 and 76,490.74 is: 105,556.07
Step by Step Solution
- Step 1: Write the proportion equation
136,919.14 : 188,946.36 = 76,490.74 : x - Step 2: Convert to fraction form
136,919.14/188,946.36 = 76,490.74/x - Step 3: Cross multiply
136,919.14x = 188,946.36 × 76,490.74 - Step 4: Simplify right side
136,919.14x = 14,452,646,896.71 - Step 5: Solve for x
x = 14,452,646,896.71/136,919.14 - Step 6: Final answer
x = 105,556.07
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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.