Finding the Fourth Proportional to 78,421,620.78, 108,221,239.42 and 43,138,668.08
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Solution
The fourth proportional to 78,421,620.78, 108,221,239.42 and 43,138,668.08 is: 59,531,033.40
Step by Step Solution
- Step 1: Write the proportion equation
78,421,620.78 : 108,221,239.42 = 43,138,668.08 : x - Step 2: Convert to fraction form
78,421,620.78/108,221,239.42 = 43,138,668.08/x - Step 3: Cross multiply
78,421,620.78x = 108,221,239.42 × 43,138,668.08 - Step 4: Simplify right side
78,421,620.78x = 4,668,520,125,896,639 - Step 5: Solve for x
x = 4,668,520,125,896,639/78,421,620.78 - Step 6: Final answer
x = 59,531,033.40
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.