Finding the Fourth Proportional to 131,078.12, 180,991.67 and 105,503.99
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Solution
The fourth proportional to 131,078.12, 180,991.67 and 105,503.99 is: 145,679.10
Step by Step Solution
- Step 1: Write the proportion equation
131,078.12 : 180,991.67 = 105,503.99 : x - Step 2: Convert to fraction form
131,078.12/180,991.67 = 105,503.99/x - Step 3: Cross multiply
131,078.12x = 180,991.67 × 105,503.99 - Step 4: Simplify right side
131,078.12x = 19,095,341,909.29 - Step 5: Solve for x
x = 19,095,341,909.29/131,078.12 - Step 6: Final answer
x = 145,679.10
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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.