Finding the Fourth Proportional to 138,985.24, 191,800.83 and 81,609.70
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Solution
The fourth proportional to 138,985.24, 191,800.83 and 81,609.70 is: 112,622.09
Step by Step Solution
- Step 1: Write the proportion equation
138,985.24 : 191,800.83 = 81,609.70 : x - Step 2: Convert to fraction form
138,985.24/191,800.83 = 81,609.70/x - Step 3: Cross multiply
138,985.24x = 191,800.83 × 81,609.70 - Step 4: Simplify right side
138,985.24x = 15,652,808,196.05 - Step 5: Solve for x
x = 15,652,808,196.05/138,985.24 - Step 6: Final answer
x = 112,622.09
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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.