Finding the Fourth Proportional to 128,607.16, 192,966.06 and 69,431.08
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Solution
The fourth proportional to 128,607.16, 192,966.06 and 69,431.08 is: 104,176.49
Step by Step Solution
- Step 1: Write the proportion equation
128,607.16 : 192,966.06 = 69,431.08 : x - Step 2: Convert to fraction form
128,607.16/192,966.06 = 69,431.08/x - Step 3: Cross multiply
128,607.16x = 192,966.06 × 69,431.08 - Step 4: Simplify right side
128,607.16x = 13,397,841,949.14 - Step 5: Solve for x
x = 13,397,841,949.14/128,607.16 - Step 6: Final answer
x = 104,176.49
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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.