Finding the Fourth Proportional to 138,497.80, 207,746.70 and 85,966.60
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Solution
The fourth proportional to 138,497.80, 207,746.70 and 85,966.60 is: 128,949.90
Step by Step Solution
- Step 1: Write the proportion equation
138,497.80 : 207,746.70 = 85,966.60 : x - Step 2: Convert to fraction form
138,497.80/207,746.70 = 85,966.60/x - Step 3: Cross multiply
138,497.80x = 207,746.70 × 85,966.60 - Step 4: Simplify right side
138,497.80x = 17,859,277,460.22 - Step 5: Solve for x
x = 17,859,277,460.22/138,497.80 - Step 6: Final answer
x = 128,949.90
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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.