Finding the Fourth Proportional to 87,770,942.48, 121,205,319.35 and 65,706,135.45
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Solution
The fourth proportional to 87,770,942.48, 121,205,319.35 and 65,706,135.45 is: 90,735,417.73
Step by Step Solution
- Step 1: Write the proportion equation
87,770,942.48 : 121,205,319.35 = 65,706,135.45 : x - Step 2: Convert to fraction form
87,770,942.48/121,205,319.35 = 65,706,135.45/x - Step 3: Cross multiply
87,770,942.48x = 121,205,319.35 × 65,706,135.45 - Step 4: Simplify right side
87,770,942.48x = 7,963,933,130,143,076 - Step 5: Solve for x
x = 7,963,933,130,143,076/87,770,942.48 - Step 6: Final answer
x = 90,735,417.73
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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.