Finding the Fourth Proportional to 98,712,540.08, 136,365,198.75 and 78,840,214.74
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Solution
The fourth proportional to 98,712,540.08, 136,365,198.75 and 78,840,214.74 is: 108,912,824.49
Step by Step Solution
- Step 1: Write the proportion equation
98,712,540.08 : 136,365,198.75 = 78,840,214.74 : x - Step 2: Convert to fraction form
98,712,540.08/136,365,198.75 = 78,840,214.74/x - Step 3: Cross multiply
98,712,540.08x = 136,365,198.75 × 78,840,214.74 - Step 4: Simplify right side
98,712,540.08x = 10,751,061,552,512,778 - Step 5: Solve for x
x = 10,751,061,552,512,778/98,712,540.08 - Step 6: Final answer
x = 108,912,824.49
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1.5x scale
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.