Finding the Fourth Proportional to 156,138.13, 215,470.56 and 84,518.74
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Solution
The fourth proportional to 156,138.13, 215,470.56 and 84,518.74 is: 116,635.83
Step by Step Solution
- Step 1: Write the proportion equation
156,138.13 : 215,470.56 = 84,518.74 : x - Step 2: Convert to fraction form
156,138.13/215,470.56 = 84,518.74/x - Step 3: Cross multiply
156,138.13x = 215,470.56 × 84,518.74 - Step 4: Simplify right side
156,138.13x = 18,211,300,238.29 - Step 5: Solve for x
x = 18,211,300,238.29/156,138.13 - Step 6: Final answer
x = 116,635.83
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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.