Finding the Fourth Proportional to 79,181,899.20, 118,772,848.80 and 66,427,315.20
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Solution
The fourth proportional to 79,181,899.20, 118,772,848.80 and 66,427,315.20 is: 99,640,972.80
Step by Step Solution
- Step 1: Write the proportion equation
79,181,899.20 : 118,772,848.80 = 66,427,315.20 : x - Step 2: Convert to fraction form
79,181,899.20/118,772,848.80 = 66,427,315.20/x - Step 3: Cross multiply
79,181,899.20x = 118,772,848.80 × 66,427,315.20 - Step 4: Simplify right side
79,181,899.20x = 7,889,761,464,439,542 - Step 5: Solve for x
x = 7,889,761,464,439,542/79,181,899.20 - Step 6: Final answer
x = 99,640,972.80
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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.