Finding the Fourth Proportional to 39,190,394.71, 54,084,590.64 and 21,787,030.78
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Solution
The fourth proportional to 39,190,394.71, 54,084,590.64 and 21,787,030.78 is: 30,067,128.69
Step by Step Solution
- Step 1: Write the proportion equation
39,190,394.71 : 54,084,590.64 = 21,787,030.78 : x - Step 2: Convert to fraction form
39,190,394.71/54,084,590.64 = 21,787,030.78/x - Step 3: Cross multiply
39,190,394.71x = 54,084,590.64 × 21,787,030.78 - Step 4: Simplify right side
39,190,394.71x = 1,178,342,640,997,380 - Step 5: Solve for x
x = 1,178,342,640,997,380/39,190,394.71 - Step 6: Final answer
x = 30,067,128.69
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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.