Finding the Fourth Proportional to 123,609,302.80, 170,589,459.68 and 81,720,590.12
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Solution
The fourth proportional to 123,609,302.80, 170,589,459.68 and 81,720,590.12 is: 112,780,114.42
Step by Step Solution
- Step 1: Write the proportion equation
123,609,302.80 : 170,589,459.68 = 81,720,590.12 : x - Step 2: Convert to fraction form
123,609,302.80/170,589,459.68 = 81,720,590.12/x - Step 3: Cross multiply
123,609,302.80x = 170,589,459.68 × 81,720,590.12 - Step 4: Simplify right side
123,609,302.80x = 13,940,671,313,301,548 - Step 5: Solve for x
x = 13,940,671,313,301,548/123,609,302.80 - Step 6: Final answer
x = 112,780,114.42
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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.