Finding the Fourth Proportional to 117,789.70, 176,252.55 and 86,685.70
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Solution
The fourth proportional to 117,789.70, 176,252.55 and 86,685.70 is: 129,710.63
Step by Step Solution
- Step 1: Write the proportion equation
117,789.70 : 176,252.55 = 86,685.70 : x - Step 2: Convert to fraction form
117,789.70/176,252.55 = 86,685.70/x - Step 3: Cross multiply
117,789.70x = 176,252.55 × 86,685.70 - Step 4: Simplify right side
117,789.70x = 15,278,575,673.54 - Step 5: Solve for x
x = 15,278,575,673.54/117,789.70 - Step 6: Final answer
x = 129,710.63
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.