Finding the Fourth Proportional to 156,389.31, 215,817.63 and 84,769.26
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Solution
The fourth proportional to 156,389.31, 215,817.63 and 84,769.26 is: 116,981.79
Step by Step Solution
- Step 1: Write the proportion equation
156,389.31 : 215,817.63 = 84,769.26 : x - Step 2: Convert to fraction form
156,389.31/215,817.63 = 84,769.26/x - Step 3: Cross multiply
156,389.31x = 215,817.63 × 84,769.26 - Step 4: Simplify right side
156,389.31x = 18,294,700,790.05 - Step 5: Solve for x
x = 18,294,700,790.05/156,389.31 - Step 6: Final answer
x = 116,981.79
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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.