Finding the Fourth Proportional to 87,985.79, 121,324.07 and 65,366.75
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Solution
The fourth proportional to 87,985.79, 121,324.07 and 65,366.75 is: 90,134.55
Step by Step Solution
- Step 1: Write the proportion equation
87,985.79 : 121,324.07 = 65,366.75 : x - Step 2: Convert to fraction form
87,985.79/121,324.07 = 65,366.75/x - Step 3: Cross multiply
87,985.79x = 121,324.07 × 65,366.75 - Step 4: Simplify right side
87,985.79x = 7,930,559,219.22 - Step 5: Solve for x
x = 7,930,559,219.22/87,985.79 - Step 6: Final answer
x = 90,134.55
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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.