Finding the Fourth Proportional to 81,679.08, 112,717.14 and 45,869.12
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Solution
The fourth proportional to 81,679.08, 112,717.14 and 45,869.12 is: 63,299.38
Step by Step Solution
- Step 1: Write the proportion equation
81,679.08 : 112,717.14 = 45,869.12 : x - Step 2: Convert to fraction form
81,679.08/112,717.14 = 45,869.12/x - Step 3: Cross multiply
81,679.08x = 112,717.14 × 45,869.12 - Step 4: Simplify right side
81,679.08x = 5,170,235,457.13 - Step 5: Solve for x
x = 5,170,235,457.13/81,679.08 - Step 6: Final answer
x = 63,299.38
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1.5x scale
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.