Finding the Fourth Proportional to 86,289,417.20, 129,434,125.80 and 40,939,785.20
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Solution
The fourth proportional to 86,289,417.20, 129,434,125.80 and 40,939,785.20 is: 61,409,677.80
Step by Step Solution
- Step 1: Write the proportion equation
86,289,417.20 : 129,434,125.80 = 40,939,785.20 : x - Step 2: Convert to fraction form
86,289,417.20/129,434,125.80 = 40,939,785.20/x - Step 3: Cross multiply
86,289,417.20x = 129,434,125.80 × 40,939,785.20 - Step 4: Simplify right side
86,289,417.20x = 5,299,005,307,801,778 - Step 5: Solve for x
x = 5,299,005,307,801,778/86,289,417.20 - Step 6: Final answer
x = 61,409,677.80
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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.