Finding the Fourth Proportional to 81,330,289,421.70, 121,995,434,132.55 and 81,330,289,421.70
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Solution
The fourth proportional to 81,330,289,421.70, 121,995,434,132.55 and 81,330,289,421.70 is: 121,995,434,132.55
Step by Step Solution
- Step 1: Write the proportion equation
81,330,289,421.70 : 121,995,434,132.55 = 81,330,289,421.70 : x - Step 2: Convert to fraction form
81,330,289,421.70/121,995,434,132.55 = 81,330,289,421.70/x - Step 3: Cross multiply
81,330,289,421.70x = 121,995,434,132.55 × 81,330,289,421.70 - Step 4: Simplify right side
81,330,289,421.70x = 9,921,923,966,126,230,863,872 - Step 5: Solve for x
x = 9,921,923,966,126,230,863,872/81,330,289,421.70 - Step 6: Final answer
x = 121,995,434,132.55
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1.5x scale
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.