Finding the Fourth Proportional to 31,129,563.69, 42,970,261.32 and 18,740,232.99
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Solution
The fourth proportional to 31,129,563.69, 42,970,261.32 and 18,740,232.99 is: 25,868,422.60
Step by Step Solution
- Step 1: Write the proportion equation
31,129,563.69 : 42,970,261.32 = 18,740,232.99 : x - Step 2: Convert to fraction form
31,129,563.69/42,970,261.32 = 18,740,232.99/x - Step 3: Cross multiply
31,129,563.69x = 42,970,261.32 × 18,740,232.99 - Step 4: Simplify right side
31,129,563.69x = 805,272,708,777,984.88 - Step 5: Solve for x
x = 805,272,708,777,984.88/31,129,563.69 - Step 6: Final answer
x = 25,868,422.60
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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.