Finding the Fourth Proportional to 139,244.76, 208,394.10 and 85,970.70
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Solution
The fourth proportional to 139,244.76, 208,394.10 and 85,970.70 is: 128,663.99
Step by Step Solution
- Step 1: Write the proportion equation
139,244.76 : 208,394.10 = 85,970.70 : x - Step 2: Convert to fraction form
139,244.76/208,394.10 = 85,970.70/x - Step 3: Cross multiply
139,244.76x = 208,394.10 × 85,970.70 - Step 4: Simplify right side
139,244.76x = 17,915,786,652.87 - Step 5: Solve for x
x = 17,915,786,652.87/139,244.76 - Step 6: Final answer
x = 128,663.99
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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.