Finding the Fourth Proportional to 79,181,969.70, 118,772,954.55 and 66,427,385.70
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Solution
The fourth proportional to 79,181,969.70, 118,772,954.55 and 66,427,385.70 is: 99,641,078.55
Step by Step Solution
- Step 1: Write the proportion equation
79,181,969.70 : 118,772,954.55 = 66,427,385.70 : x - Step 2: Convert to fraction form
79,181,969.70/118,772,954.55 = 66,427,385.70/x - Step 3: Cross multiply
79,181,969.70x = 118,772,954.55 × 66,427,385.70 - Step 4: Simplify right side
79,181,969.70x = 7,889,776,862,621,420 - Step 5: Solve for x
x = 7,889,776,862,621,420/79,181,969.70 - Step 6: Final answer
x = 99,641,078.55
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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.