Finding the Fourth Proportional to 138,169,139.12, 190,593,479.88 and 89,276,567.12
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Solution
The fourth proportional to 138,169,139.12, 190,593,479.88 and 89,276,567.12 is: 123,150,015.32
Step by Step Solution
- Step 1: Write the proportion equation
138,169,139.12 : 190,593,479.88 = 89,276,567.12 : x - Step 2: Convert to fraction form
138,169,139.12/190,593,479.88 = 89,276,567.12/x - Step 3: Cross multiply
138,169,139.12x = 190,593,479.88 × 89,276,567.12 - Step 4: Simplify right side
138,169,139.12x = 17,015,531,599,141,190 - Step 5: Solve for x
x = 17,015,531,599,141,190/138,169,139.12 - Step 6: Final answer
x = 123,150,015.32
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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.