Finding the Fourth Proportional to 155,949.84, 215,212.68 and 87,960.60
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Solution
The fourth proportional to 155,949.84, 215,212.68 and 87,960.60 is: 121,386.70
Step by Step Solution
- Step 1: Write the proportion equation
155,949.84 : 215,212.68 = 87,960.60 : x - Step 2: Convert to fraction form
155,949.84/215,212.68 = 87,960.60/x - Step 3: Cross multiply
155,949.84x = 215,212.68 × 87,960.60 - Step 4: Simplify right side
155,949.84x = 18,930,236,460.41 - Step 5: Solve for x
x = 18,930,236,460.41/155,949.84 - Step 6: Final answer
x = 121,386.70
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1.5x scale
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.