Finding the Fourth Proportional to 141,972,390.40, 212,811,619.20 and 77,139,212.80
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Solution
The fourth proportional to 141,972,390.40, 212,811,619.20 and 77,139,212.80 is: 115,628,966.54
Step by Step Solution
- Step 1: Write the proportion equation
141,972,390.40 : 212,811,619.20 = 77,139,212.80 : x - Step 2: Convert to fraction form
141,972,390.40/212,811,619.20 = 77,139,212.80/x - Step 3: Cross multiply
141,972,390.40x = 212,811,619.20 × 77,139,212.80 - Step 4: Simplify right side
141,972,390.40x = 16,416,120,779,781,364 - Step 5: Solve for x
x = 16,416,120,779,781,364/141,972,390.40 - Step 6: Final answer
x = 115,628,966.54
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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.