Finding the Fourth Proportional to 287,528,108.80, 431,292,163.20 and 115,128,648.40
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Solution
The fourth proportional to 287,528,108.80, 431,292,163.20 and 115,128,648.40 is: 172,692,972.60
Step by Step Solution
- Step 1: Write the proportion equation
287,528,108.80 : 431,292,163.20 = 115,128,648.40 : x - Step 2: Convert to fraction form
287,528,108.80/431,292,163.20 = 115,128,648.40/x - Step 3: Cross multiply
287,528,108.80x = 431,292,163.20 × 115,128,648.40 - Step 4: Simplify right side
287,528,108.80x = 49,654,083,814,728,224 - Step 5: Solve for x
x = 49,654,083,814,728,224/287,528,108.80 - Step 6: Final answer
x = 172,692,972.60
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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.