Finding the Fourth Proportional to 81,657,218.80, 122,485,828.20 and 74,098,946.80
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Solution
The fourth proportional to 81,657,218.80, 122,485,828.20 and 74,098,946.80 is: 111,148,420.20
Step by Step Solution
- Step 1: Write the proportion equation
81,657,218.80 : 122,485,828.20 = 74,098,946.80 : x - Step 2: Convert to fraction form
81,657,218.80/122,485,828.20 = 74,098,946.80/x - Step 3: Cross multiply
81,657,218.80x = 122,485,828.20 × 74,098,946.80 - Step 4: Simplify right side
81,657,218.80x = 9,076,070,867,545,740 - Step 5: Solve for x
x = 9,076,070,867,545,740/81,657,218.80 - Step 6: Final answer
x = 111,148,420.20
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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.