Finding the Fourth Proportional to 72,813,893.60, 109,220,840.40 and 66,578,319.20
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Solution
The fourth proportional to 72,813,893.60, 109,220,840.40 and 66,578,319.20 is: 99,867,478.80
Step by Step Solution
- Step 1: Write the proportion equation
72,813,893.60 : 109,220,840.40 = 66,578,319.20 : x - Step 2: Convert to fraction form
72,813,893.60/109,220,840.40 = 66,578,319.20/x - Step 3: Cross multiply
72,813,893.60x = 109,220,840.40 × 66,578,319.20 - Step 4: Simplify right side
72,813,893.60x = 7,271,739,975,443,456 - Step 5: Solve for x
x = 7,271,739,975,443,456/72,813,893.60 - Step 6: Final answer
x = 99,867,478.80
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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.