Finding the Fourth Proportional to 78,583,938.48, 107,660,518.61 and 75,638,554.92
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Solution
The fourth proportional to 78,583,938.48, 107,660,518.61 and 75,638,554.92 is: 103,625,323.53
Step by Step Solution
- Step 1: Write the proportion equation
78,583,938.48 : 107,660,518.61 = 75,638,554.92 : x - Step 2: Convert to fraction form
78,583,938.48/107,660,518.61 = 75,638,554.92/x - Step 3: Cross multiply
78,583,938.48x = 107,660,518.61 × 75,638,554.92 - Step 4: Simplify right side
78,583,938.48x = 8,143,286,049,219,975 - Step 5: Solve for x
x = 8,143,286,049,219,975/78,583,938.48 - Step 6: Final answer
x = 103,625,323.53
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Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.