Finding the Fourth Proportional to 128,697,100.58, 177,600,737.06 and 69,956,270.75
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Solution
The fourth proportional to 128,697,100.58, 177,600,737.06 and 69,956,270.75 is: 96,538,967.78
Step by Step Solution
- Step 1: Write the proportion equation
128,697,100.58 : 177,600,737.06 = 69,956,270.75 : x - Step 2: Convert to fraction form
128,697,100.58/177,600,737.06 = 69,956,270.75/x - Step 3: Cross multiply
128,697,100.58x = 177,600,737.06 × 69,956,270.75 - Step 4: Simplify right side
128,697,100.58x = 12,424,285,246,819,138 - Step 5: Solve for x
x = 12,424,285,246,819,138/128,697,100.58 - Step 6: Final answer
x = 96,538,967.78
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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.