Finding the Fourth Proportional to 87,916.90, 121,325.16 and 47,631.68
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Solution
The fourth proportional to 87,916.90, 121,325.16 and 47,631.68 is: 65,731.63
Step by Step Solution
- Step 1: Write the proportion equation
87,916.90 : 121,325.16 = 47,631.68 : x - Step 2: Convert to fraction form
87,916.90/121,325.16 = 47,631.68/x - Step 3: Cross multiply
87,916.90x = 121,325.16 × 47,631.68 - Step 4: Simplify right side
87,916.90x = 5,778,921,197.07 - Step 5: Solve for x
x = 5,778,921,197.07/87,916.90 - Step 6: Final answer
x = 65,731.63
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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.