Finding the Fourth Proportional to 153,979,839.21, 212,420,949.55 and 136,356,701.61
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Solution
The fourth proportional to 153,979,839.21, 212,420,949.55 and 136,356,701.61 is: 188,109,171.84
Step by Step Solution
- Step 1: Write the proportion equation
153,979,839.21 : 212,420,949.55 = 136,356,701.61 : x - Step 2: Convert to fraction form
153,979,839.21/212,420,949.55 = 136,356,701.61/x - Step 3: Cross multiply
153,979,839.21x = 212,420,949.55 × 136,356,701.61 - Step 4: Simplify right side
153,979,839.21x = 28,965,020,033,161,328 - Step 5: Solve for x
x = 28,965,020,033,161,328/153,979,839.21 - Step 6: Final answer
x = 188,109,171.84
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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.