Finding the Fourth Proportional to 128,457,371.28, 177,271,338.36 and 69,720,029.72
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Solution
The fourth proportional to 128,457,371.28, 177,271,338.36 and 69,720,029.72 is: 96,213,731.11
Step by Step Solution
- Step 1: Write the proportion equation
128,457,371.28 : 177,271,338.36 = 69,720,029.72 : x - Step 2: Convert to fraction form
128,457,371.28/177,271,338.36 = 69,720,029.72/x - Step 3: Cross multiply
128,457,371.28x = 177,271,338.36 × 69,720,029.72 - Step 4: Simplify right side
128,457,371.28x = 12,359,362,978,963,376 - Step 5: Solve for x
x = 12,359,362,978,963,376/128,457,371.28 - Step 6: Final answer
x = 96,213,731.11
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.