Finding the Fourth Proportional to 66,430,419.20, 99,645,628.80 and 60,371,991.80
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Solution
The fourth proportional to 66,430,419.20, 99,645,628.80 and 60,371,991.80 is: 90,557,987.70
Step by Step Solution
- Step 1: Write the proportion equation
66,430,419.20 : 99,645,628.80 = 60,371,991.80 : x - Step 2: Convert to fraction form
66,430,419.20/99,645,628.80 = 60,371,991.80/x - Step 3: Cross multiply
66,430,419.20x = 99,645,628.80 × 60,371,991.80 - Step 4: Simplify right side
66,430,419.20x = 6,015,805,084,819,443 - Step 5: Solve for x
x = 6,015,805,084,819,443/66,430,419.20 - Step 6: Final answer
x = 90,557,987.70
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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.