Finding the Fourth Proportional to 128,435,289.40, 177,240,815.25 and 69,697,955.09
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Solution
The fourth proportional to 128,435,289.40, 177,240,815.25 and 69,697,955.09 is: 96,183,240.92
Step by Step Solution
- Step 1: Write the proportion equation
128,435,289.40 : 177,240,815.25 = 69,697,955.09 : x - Step 2: Convert to fraction form
128,435,289.40/177,240,815.25 = 69,697,955.09/x - Step 3: Cross multiply
128,435,289.40x = 177,240,815.25 × 69,697,955.09 - Step 4: Simplify right side
128,435,289.40x = 12,353,322,382,244,848 - Step 5: Solve for x
x = 12,353,322,382,244,848/128,435,289.40 - Step 6: Final answer
x = 96,183,240.92
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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.