Finding the Fourth Proportional to 128,746,844.92, 177,665,239.74 and 72,996,016.80
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Solution
The fourth proportional to 128,746,844.92, 177,665,239.74 and 72,996,016.80 is: 100,731,437.99
Step by Step Solution
- Step 1: Write the proportion equation
128,746,844.92 : 177,665,239.74 = 72,996,016.80 : x - Step 2: Convert to fraction form
128,746,844.92/177,665,239.74 = 72,996,016.80/x - Step 3: Cross multiply
128,746,844.92x = 177,665,239.74 × 72,996,016.80 - Step 4: Simplify right side
128,746,844.92x = 12,968,854,824,837,068 - Step 5: Solve for x
x = 12,968,854,824,837,068/128,746,844.92 - Step 6: Final answer
x = 100,731,437.99
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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.