Finding the Fourth Proportional to 155,857.20, 215,031.36 and 87,865.68
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Solution
The fourth proportional to 155,857.20, 215,031.36 and 87,865.68 is: 121,225.56
Step by Step Solution
- Step 1: Write the proportion equation
155,857.20 : 215,031.36 = 87,865.68 : x - Step 2: Convert to fraction form
155,857.20/215,031.36 = 87,865.68/x - Step 3: Cross multiply
155,857.20x = 215,031.36 × 87,865.68 - Step 4: Simplify right side
155,857.20x = 18,893,876,667.72 - Step 5: Solve for x
x = 18,893,876,667.72/155,857.20 - Step 6: Final answer
x = 121,225.56
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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.