Finding the Fourth Proportional to 121,990,310.28, 168,346,831.14 and 66,989,651.40
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Solution
The fourth proportional to 121,990,310.28, 168,346,831.14 and 66,989,651.40 is: 92,445,830.38
Step by Step Solution
- Step 1: Write the proportion equation
121,990,310.28 : 168,346,831.14 = 66,989,651.40 : x - Step 2: Convert to fraction form
121,990,310.28/168,346,831.14 = 66,989,651.40/x - Step 3: Cross multiply
121,990,310.28x = 168,346,831.14 × 66,989,651.40 - Step 4: Simplify right side
121,990,310.28x = 11,277,495,532,363,264 - Step 5: Solve for x
x = 11,277,495,532,363,264/121,990,310.28 - Step 6: Final answer
x = 92,445,830.38
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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.