Finding the Fourth Proportional to 136,995,928.88, 189,081,846.99 and 81,272,279.48
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Solution
The fourth proportional to 136,995,928.88, 189,081,846.99 and 81,272,279.48 is: 112,172,039.26
Step by Step Solution
- Step 1: Write the proportion equation
136,995,928.88 : 189,081,846.99 = 81,272,279.48 : x - Step 2: Convert to fraction form
136,995,928.88/189,081,846.99 = 81,272,279.48/x - Step 3: Cross multiply
136,995,928.88x = 189,081,846.99 × 81,272,279.48 - Step 4: Simplify right side
136,995,928.88x = 15,367,112,712,220,468 - Step 5: Solve for x
x = 15,367,112,712,220,468/136,995,928.88 - Step 6: Final answer
x = 112,172,039.26
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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.