Finding the Fourth Proportional to 81,239,273.78, 121,879,079.67 and 40,317,918.26
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Solution
The fourth proportional to 81,239,273.78, 121,879,079.67 and 40,317,918.26 is: 60,486,886.98
Step by Step Solution
- Step 1: Write the proportion equation
81,239,273.78 : 121,879,079.67 = 40,317,918.26 : x - Step 2: Convert to fraction form
81,239,273.78/121,879,079.67 = 40,317,918.26/x - Step 3: Cross multiply
81,239,273.78x = 121,879,079.67 × 40,317,918.26 - Step 4: Simplify right side
81,239,273.78x = 4,913,910,771,739,088 - Step 5: Solve for x
x = 4,913,910,771,739,088/81,239,273.78 - Step 6: Final answer
x = 60,486,886.98
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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.