Finding the Fourth Proportional to 98,486,853.21, 135,918,890.42 and 54,432,905.31
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Solution
The fourth proportional to 98,486,853.21, 135,918,890.42 and 54,432,905.31 is: 75,121,296.40
Step by Step Solution
- Step 1: Write the proportion equation
98,486,853.21 : 135,918,890.42 = 54,432,905.31 : x - Step 2: Convert to fraction form
98,486,853.21/135,918,890.42 = 54,432,905.31/x - Step 3: Cross multiply
98,486,853.21x = 135,918,890.42 × 54,432,905.31 - Step 4: Simplify right side
98,486,853.21x = 7,398,460,091,799,961 - Step 5: Solve for x
x = 7,398,460,091,799,961/98,486,853.21 - Step 6: Final answer
x = 75,121,296.40
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.