Finding the Fourth Proportional to 81,281,811.68, 121,943,964.72 and 47,170,365.92
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Solution
The fourth proportional to 81,281,811.68, 121,943,964.72 and 47,170,365.92 is: 70,767,879.29
Step by Step Solution
- Step 1: Write the proportion equation
81,281,811.68 : 121,943,964.72 = 47,170,365.92 : x - Step 2: Convert to fraction form
81,281,811.68/121,943,964.72 = 47,170,365.92/x - Step 3: Cross multiply
81,281,811.68x = 121,943,964.72 × 47,170,365.92 - Step 4: Simplify right side
81,281,811.68x = 5,752,141,437,577,971 - Step 5: Solve for x
x = 5,752,141,437,577,971/81,281,811.68 - Step 6: Final answer
x = 70,767,879.29
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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.