Finding the Fourth Proportional to 128,736,021.80, 193,104,032.70 and 31,690,958.60
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Solution
The fourth proportional to 128,736,021.80, 193,104,032.70 and 31,690,958.60 is: 47,536,437.90
Step by Step Solution
- Step 1: Write the proportion equation
128,736,021.80 : 193,104,032.70 = 31,690,958.60 : x - Step 2: Convert to fraction form
128,736,021.80/193,104,032.70 = 31,690,958.60/x - Step 3: Cross multiply
128,736,021.80x = 193,104,032.70 × 31,690,958.60 - Step 4: Simplify right side
128,736,021.80x = 6,119,651,905,788,746 - Step 5: Solve for x
x = 6,119,651,905,788,746/128,736,021.80 - Step 6: Final answer
x = 47,536,437.90
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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.