Finding the Fourth Proportional to 81,869.84, 122,207.10 and 70,257.68
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Solution
The fourth proportional to 81,869.84, 122,207.10 and 70,257.68 is: 104,873.63
Step by Step Solution
- Step 1: Write the proportion equation
81,869.84 : 122,207.10 = 70,257.68 : x - Step 2: Convert to fraction form
81,869.84/122,207.10 = 70,257.68/x - Step 3: Cross multiply
81,869.84x = 122,207.10 × 70,257.68 - Step 4: Simplify right side
81,869.84x = 8,585,987,325.53 - Step 5: Solve for x
x = 8,585,987,325.53/81,869.84 - Step 6: Final answer
x = 104,873.63
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.