Finding the Fourth Proportional to 157,748.26, 217,690.94 and 86,128.06
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Solution
The fourth proportional to 157,748.26, 217,690.94 and 86,128.06 is: 118,855.82
Step by Step Solution
- Step 1: Write the proportion equation
157,748.26 : 217,690.94 = 86,128.06 : x - Step 2: Convert to fraction form
157,748.26/217,690.94 = 86,128.06/x - Step 3: Cross multiply
157,748.26x = 217,690.94 × 86,128.06 - Step 4: Simplify right side
157,748.26x = 18,749,298,341.78 - Step 5: Solve for x
x = 18,749,298,341.78/157,748.26 - Step 6: Final answer
x = 118,855.82
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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.