Finding the Fourth Proportional to 135,731.57, 187,279.49 and 78,358.46
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Solution
The fourth proportional to 135,731.57, 187,279.49 and 78,358.46 is: 108,117.31
Step by Step Solution
- Step 1: Write the proportion equation
135,731.57 : 187,279.49 = 78,358.46 : x - Step 2: Convert to fraction form
135,731.57/187,279.49 = 78,358.46/x - Step 3: Cross multiply
135,731.57x = 187,279.49 × 78,358.46 - Step 4: Simplify right side
135,731.57x = 14,674,931,685.48 - Step 5: Solve for x
x = 14,674,931,685.48/135,731.57 - Step 6: Final answer
x = 108,117.31
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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.