Finding the Fourth Proportional to 128,726,804.80, 193,090,207.20 and 74,307,246.40
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Solution
The fourth proportional to 128,726,804.80, 193,090,207.20 and 74,307,246.40 is: 111,460,869.60
Step by Step Solution
- Step 1: Write the proportion equation
128,726,804.80 : 193,090,207.20 = 74,307,246.40 : x - Step 2: Convert to fraction form
128,726,804.80/193,090,207.20 = 74,307,246.40/x - Step 3: Cross multiply
128,726,804.80x = 193,090,207.20 × 74,307,246.40 - Step 4: Simplify right side
128,726,804.80x = 14,348,001,603,837,454 - Step 5: Solve for x
x = 14,348,001,603,837,454/128,726,804.80 - Step 6: Final answer
x = 111,460,869.60
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.