Finding the Fourth Proportional to 157,743.18, 217,690.11 and 86,127.75
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Solution
The fourth proportional to 157,743.18, 217,690.11 and 86,127.75 is: 118,858.76
Step by Step Solution
- Step 1: Write the proportion equation
157,743.18 : 217,690.11 = 86,127.75 : x - Step 2: Convert to fraction form
157,743.18/217,690.11 = 86,127.75/x - Step 3: Cross multiply
157,743.18x = 217,690.11 × 86,127.75 - Step 4: Simplify right side
157,743.18x = 18,749,159,371.55 - Step 5: Solve for x
x = 18,749,159,371.55/157,743.18 - Step 6: Final answer
x = 118,858.76
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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.