Finding the Fourth Proportional to 128,958,688.80, 193,438,033.20 and 121,568,378.40
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Solution
The fourth proportional to 128,958,688.80, 193,438,033.20 and 121,568,378.40 is: 182,352,567.60
Step by Step Solution
- Step 1: Write the proportion equation
128,958,688.80 : 193,438,033.20 = 121,568,378.40 : x - Step 2: Convert to fraction form
128,958,688.80/193,438,033.20 = 121,568,378.40/x - Step 3: Cross multiply
128,958,688.80x = 193,438,033.20 × 121,568,378.40 - Step 4: Simplify right side
128,958,688.80x = 23,515,948,017,009,364 - Step 5: Solve for x
x = 23,515,948,017,009,364/128,958,688.80 - Step 6: Final answer
x = 182,352,567.60
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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.