Finding the Fourth Proportional to 88,421.86, 121,986.09 and 54,420.09
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Solution
The fourth proportional to 88,421.86, 121,986.09 and 54,420.09 is: 75,077.52
Step by Step Solution
- Step 1: Write the proportion equation
88,421.86 : 121,986.09 = 54,420.09 : x - Step 2: Convert to fraction form
88,421.86/121,986.09 = 54,420.09/x - Step 3: Cross multiply
88,421.86x = 121,986.09 × 54,420.09 - Step 4: Simplify right side
88,421.86x = 6,638,493,996.55 - Step 5: Solve for x
x = 6,638,493,996.55/88,421.86 - Step 6: Final answer
x = 75,077.52
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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.