Finding the Fourth Proportional to 77,189.63, 115,725.09 and 39,207.69
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Solution
The fourth proportional to 77,189.63, 115,725.09 and 39,207.69 is: 58,781.39
Step by Step Solution
- Step 1: Write the proportion equation
77,189.63 : 115,725.09 = 39,207.69 : x - Step 2: Convert to fraction form
77,189.63/115,725.09 = 39,207.69/x - Step 3: Cross multiply
77,189.63x = 115,725.09 × 39,207.69 - Step 4: Simplify right side
77,189.63x = 4,537,313,645.24 - Step 5: Solve for x
x = 4,537,313,645.24/77,189.63 - Step 6: Final answer
x = 58,781.39
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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.