Finding the Fourth Proportional to 86,939,813.80, 130,409,720.70 and 61,430,645.80
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Solution
The fourth proportional to 86,939,813.80, 130,409,720.70 and 61,430,645.80 is: 92,145,968.70
Step by Step Solution
- Step 1: Write the proportion equation
86,939,813.80 : 130,409,720.70 = 61,430,645.80 : x - Step 2: Convert to fraction form
86,939,813.80/130,409,720.70 = 61,430,645.80/x - Step 3: Cross multiply
86,939,813.80x = 130,409,720.70 × 61,430,645.80 - Step 4: Simplify right side
86,939,813.80x = 8,011,153,361,198,628 - Step 5: Solve for x
x = 8,011,153,361,198,628/86,939,813.80 - Step 6: Final answer
x = 92,145,968.70
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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.