Finding the Fourth Proportional to 128,366,869.72, 177,145,232.70 and 69,629,387.08
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Solution
The fourth proportional to 128,366,869.72, 177,145,232.70 and 69,629,387.08 is: 96,087,985.97
Step by Step Solution
- Step 1: Write the proportion equation
128,366,869.72 : 177,145,232.70 = 69,629,387.08 : x - Step 2: Convert to fraction form
128,366,869.72/177,145,232.70 = 69,629,387.08/x - Step 3: Cross multiply
128,366,869.72x = 177,145,232.70 × 69,629,387.08 - Step 4: Simplify right side
128,366,869.72x = 12,334,513,977,044,972 - Step 5: Solve for x
x = 12,334,513,977,044,972/128,366,869.72 - Step 6: Final answer
x = 96,087,985.97
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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.