Finding the Fourth Proportional to 71,207,999.20, 106,811,998.80 and 66,430,424.80
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Solution
The fourth proportional to 71,207,999.20, 106,811,998.80 and 66,430,424.80 is: 99,645,637.20
Step by Step Solution
- Step 1: Write the proportion equation
71,207,999.20 : 106,811,998.80 = 66,430,424.80 : x - Step 2: Convert to fraction form
71,207,999.20/106,811,998.80 = 66,430,424.80/x - Step 3: Cross multiply
71,207,999.20x = 106,811,998.80 × 66,430,424.80 - Step 4: Simplify right side
71,207,999.20x = 7,095,566,454,021,090 - Step 5: Solve for x
x = 7,095,566,454,021,090/71,207,999.20 - Step 6: Final answer
x = 99,645,637.20
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1.5x scale
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.