Finding the Fourth Proportional to 128,314,830.80, 192,472,246.20 and 77,296,494.80
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Solution
The fourth proportional to 128,314,830.80, 192,472,246.20 and 77,296,494.80 is: 115,944,742.20
Step by Step Solution
- Step 1: Write the proportion equation
128,314,830.80 : 192,472,246.20 = 77,296,494.80 : x - Step 2: Convert to fraction form
128,314,830.80/192,472,246.20 = 77,296,494.80/x - Step 3: Cross multiply
128,314,830.80x = 192,472,246.20 × 77,296,494.80 - Step 4: Simplify right side
128,314,830.80x = 14,877,429,977,542,618 - Step 5: Solve for x
x = 14,877,429,977,542,618/128,314,830.80 - Step 6: Final answer
x = 115,944,742.20
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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.