Finding the Fourth Proportional to 128,331,817,251.84, 192,419,236,531.20 and 61,199,594,918.40
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Solution
The fourth proportional to 128,331,817,251.84, 192,419,236,531.20 and 61,199,594,918.40 is: 91,761,961,938.93
Step by Step Solution
- Step 1: Write the proportion equation
128,331,817,251.84 : 192,419,236,531.20 = 61,199,594,918.40 : x - Step 2: Convert to fraction form
128,331,817,251.84/192,419,236,531.20 = 61,199,594,918.40/x - Step 3: Cross multiply
128,331,817,251.84x = 192,419,236,531.20 × 61,199,594,918.40 - Step 4: Simplify right side
128,331,817,251.84x = 11,775,979,330,217,235,709,952 - Step 5: Solve for x
x = 11,775,979,330,217,235,709,952/128,331,817,251.84 - Step 6: Final answer
x = 91,761,961,938.93
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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.