Finding the Fourth Proportional to 38,689,108.42, 53,390,967.84 and 21,285,080.26
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Solution
The fourth proportional to 38,689,108.42, 53,390,967.84 and 21,285,080.26 is: 29,373,409.78
Step by Step Solution
- Step 1: Write the proportion equation
38,689,108.42 : 53,390,967.84 = 21,285,080.26 : x - Step 2: Convert to fraction form
38,689,108.42/53,390,967.84 = 21,285,080.26/x - Step 3: Cross multiply
38,689,108.42x = 53,390,967.84 × 21,285,080.26 - Step 4: Simplify right side
38,689,108.42x = 1,136,431,035,633,479 - Step 5: Solve for x
x = 1,136,431,035,633,479/38,689,108.42 - Step 6: Final answer
x = 29,373,409.78
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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.