Finding the Fourth Proportional to 75,869.80, 113,804.70 and 71,981.80
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Solution
The fourth proportional to 75,869.80, 113,804.70 and 71,981.80 is: 107,972.70
Step by Step Solution
- Step 1: Write the proportion equation
75,869.80 : 113,804.70 = 71,981.80 : x - Step 2: Convert to fraction form
75,869.80/113,804.70 = 71,981.80/x - Step 3: Cross multiply
75,869.80x = 113,804.70 × 71,981.80 - Step 4: Simplify right side
75,869.80x = 8,191,867,154.46 - Step 5: Solve for x
x = 8,191,867,154.46/75,869.80 - Step 6: Final answer
x = 107,972.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.