Finding the Fourth Proportional to 128,737,979.20, 193,330,917.60 and 68,271,803.20
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Solution
The fourth proportional to 128,737,979.20, 193,330,917.60 and 68,271,803.20 is: 102,526,468.42
Step by Step Solution
- Step 1: Write the proportion equation
128,737,979.20 : 193,330,917.60 = 68,271,803.20 : x - Step 2: Convert to fraction form
128,737,979.20/193,330,917.60 = 68,271,803.20/x - Step 3: Cross multiply
128,737,979.20x = 193,330,917.60 × 68,271,803.20 - Step 4: Simplify right side
128,737,979.20x = 13,199,050,358,862,616 - Step 5: Solve for x
x = 13,199,050,358,862,616/128,737,979.20 - Step 6: Final answer
x = 102,526,468.42
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.